19921152 has 36 divisors (see below), whose sum is σ = 53021360. Its totient is φ = 6640128.

The previous prime is 19921147. The next prime is 19921159. The reversal of 19921152 is 25112991.

It is not an unprimeable number, because it can be changed into a prime (19921159) 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, 12202 + ... + 13737.

Almost surely, 2^19921152 is an apocalyptic number.

19921152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19921152 is an abundant number, since it is smaller than the sum of its proper divisors (33100208).

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

19921152 is an equidigital number, since it uses as much as digits as its factorization.

19921152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25958 (or 25944 counting only the distinct ones).

The product of its digits is 1620, while the sum is 30.

The square root of 19921152 is about 4463.3117749044. The cubic root of 19921152 is about 271.0845811977.

The spelling of 19921152 in words is "nineteen million, nine hundred twenty-one thousand, one hundred fifty-two".