21976152 has 32 divisors (see below), whose sum is σ = 59935680. Its totient is φ = 6659360.

The previous prime is 21976111. The next prime is 21976153. The reversal of 21976152 is 25167912.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21976153) 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, 41358 + ... + 41885.

It is an arithmetic number, because the mean of its divisors is an integer number (1872990).

Almost surely, 2^21976152 is an apocalyptic number.

21976152 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21976152 is an abundant number, since it is smaller than the sum of its proper divisors (37959528).

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

21976152 is a wasteful number, since it uses less digits than its factorization.

21976152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83263 (or 83259 counting only the distinct ones).

The product of its digits is 7560, while the sum is 33.

The square root of 21976152 is about 4687.8728651703. The cubic root of 21976152 is about 280.1026494384.

The spelling of 21976152 in words is "twenty-one million, nine hundred seventy-six thousand, one hundred fifty-two".