20969028 has 36 divisors (see below), whose sum is σ = 53289600. Its totient is φ = 6952176.

The previous prime is 20969017. The next prime is 20969029. The reversal of 20969028 is 82096902.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 20968983 and 20969001.

It is not an unprimeable number, because it can be changed into a prime (20969029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5701 + ... + 8627.

Almost surely, 2^20969028 is an apocalyptic number.

It is an amenable number.

20969028 is an abundant number, since it is smaller than the sum of its proper divisors (32320572).

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

20969028 is a wasteful number, since it uses less digits than its factorization.

20969028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3136 (or 3131 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 20969028 is about 4579.1951257836. The cubic root of 20969028 is about 275.7567169356.

The spelling of 20969028 in words is "twenty million, nine hundred sixty-nine thousand, twenty-eight".