22697920 has 56 divisors (see below), whose sum is σ = 61776864. Its totient is φ = 7781376.

The previous prime is 22697911. The next prime is 22697929. The reversal of 22697920 is 2979622.

It is an interprime number because it is at equal distance from previous prime (22697911) and next prime (22697929).

It is a tau number, because it is divible by the number of its divisors (56).

It is a zygodrome in base 4.

It is a self number, because there is not a number n which added to its sum of digits gives 22697920.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22697929) 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, 2827 + ... + 7306.

Almost surely, 2^22697920 is an apocalyptic number.

22697920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22697920 is an abundant number, since it is smaller than the sum of its proper divisors (39078944).

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

22697920 is a wasteful number, since it uses less digits than its factorization.

22697920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10157 (or 10147 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 22697920 is about 4764.2334115784. The cubic root of 22697920 is about 283.1361704062.

The spelling of 22697920 in words is "twenty-two million, six hundred ninety-seven thousand, nine hundred twenty".