19890053 has 4 divisors (see below), whose sum is σ = 20427660. Its totient is φ = 19352448.

The previous prime is 19890049. The next prime is 19890061. The reversal of 19890053 is 35009891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35009891 = 7 ⋅5001413.

It can be written as a sum of positive squares in 2 ways, for example, as 16785409 + 3104644 = 4097^2 + 1762^2 .

It is a cyclic number.

It is not a de Polignac number, because 19890053 - 2² = 19890049 is a prime.

It is a super-2 number, since 2×19890053² = 791228416685618, 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 = 19889995 and 19890022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19890083) 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, 268748 + ... + 268821.

It is an arithmetic number, because the mean of its divisors is an integer number (5106915).

Almost surely, 2^19890053 is an apocalyptic number.

It is an amenable number.

19890053 is a deficient number, since it is larger than the sum of its proper divisors (537607).

19890053 is an equidigital number, since it uses as much as digits as its factorization.

19890053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537606.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 19890053 is about 4459.8265661346. The cubic root of 19890053 is about 270.9434439424.

The spelling of 19890053 in words is "nineteen million, eight hundred ninety thousand, fifty-three".