20930190 has 16 divisors (see below), whose sum is σ = 50232528. Its totient is φ = 5581376.

The previous prime is 20930183. The next prime is 20930201. The reversal of 20930190 is 9103902.

It is a happy number.

It is a super-2 number, since 2×20930190² = 876145706872200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20930190.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348807 + ... + 348866.

It is an arithmetic number, because the mean of its divisors is an integer number (3139533).

Almost surely, 2^20930190 is an apocalyptic number.

20930190 is an abundant number, since it is smaller than the sum of its proper divisors (29302338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20930190 is a wasteful number, since it uses less digits than its factorization.

20930190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697683.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 20930190 is about 4574.9524587694. The cubic root of 20930190 is about 275.5863631755.

The spelling of 20930190 in words is "twenty million, nine hundred thirty thousand, one hundred ninety".