21769932 has 12 divisors (see below), whose sum is σ = 50796536. Its totient is φ = 7256640.

The previous prime is 21769931. The next prime is 21769933. The reversal of 21769932 is 23996712.

It is an interprime number because it is at equal distance from previous prime (21769931) and next prime (21769933).

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (21769931) 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, 907069 + ... + 907092.

Almost surely, 2^21769932 is an apocalyptic number.

It is an amenable number.

21769932 is an abundant number, since it is smaller than the sum of its proper divisors (29026604).

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

21769932 is a wasteful number, since it uses less digits than its factorization.

21769932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1814168 (or 1814166 counting only the distinct ones).

The product of its digits is 40824, while the sum is 39.

The square root of 21769932 is about 4665.8259718939. The cubic root of 21769932 is about 279.2237513422.

The spelling of 21769932 in words is "twenty-one million, seven hundred sixty-nine thousand, nine hundred thirty-two".