20342928 has 40 divisors (see below), whose sum is σ = 52948000. Its totient is φ = 6729984.

The previous prime is 20342923. The next prime is 20342941. The reversal of 20342928 is 82924302.

It is a super-2 number, since 2×20342928² = 827669439226368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20342895 and 20342904.

It is not an unprimeable number, because it can be changed into a prime (20342921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5148 + ... + 8196.

It is an arithmetic number, because the mean of its divisors is an integer number (1323700).

Almost surely, 2^20342928 is an apocalyptic number.

It is an amenable number.

20342928 is an abundant number, since it is smaller than the sum of its proper divisors (32605072).

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

20342928 is a wasteful number, since it uses less digits than its factorization.

20342928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3199 (or 3193 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 20342928 is about 4510.3135146018. The cubic root of 20342928 is about 272.9843944440.

The spelling of 20342928 in words is "twenty million, three hundred forty-two thousand, nine hundred twenty-eight".