20969712 has 40 divisors (see below), whose sum is σ = 60192080. Its totient is φ = 6989760.

The previous prime is 20969677. The next prime is 20969719. The reversal of 20969712 is 21796902.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20969719) 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, 23839 + ... + 24702.

It is an arithmetic number, because the mean of its divisors is an integer number (1504802).

Almost surely, 2^20969712 is an apocalyptic number.

It is an amenable number.

20969712 is an abundant number, since it is smaller than the sum of its proper divisors (39222368).

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

20969712 is a wasteful number, since it uses less digits than its factorization.

20969712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48558 (or 48546 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 20969712 is about 4579.2698107886. The cubic root of 20969712 is about 275.7597152552.

The spelling of 20969712 in words is "twenty million, nine hundred sixty-nine thousand, seven hundred twelve".