190034021 has 4 divisors (see below), whose sum is σ = 191715852. Its totient is φ = 188352192.

The previous prime is 190034017. The next prime is 190034023. The reversal of 190034021 is 120430091.

190034021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120430091 = 17 ⋅7084123.

It can be written as a sum of positive squares in 2 ways, for example, as 66601921 + 123432100 = 8161^2 + 11110^2 .

It is a cyclic number.

It is not a de Polignac number, because 190034021 - 2² = 190034017 is a prime.

It is a super-2 number, since 2×190034021² = 72225858274856882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 190033984 and 190034002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190034023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 840746 + ... + 840971.

It is an arithmetic number, because the mean of its divisors is an integer number (47928963).

Almost surely, 2^190034021 is an apocalyptic number.

It is an amenable number.

190034021 is a deficient number, since it is larger than the sum of its proper divisors (1681831).

190034021 is a wasteful number, since it uses less digits than its factorization.

190034021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1681830.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 190034021 is about 13785.2827682279. The cubic root of 190034021 is about 574.9240186936.

The spelling of 190034021 in words is "one hundred ninety million, thirty-four thousand, twenty-one".