20297732 has 24 divisors (see below), whose sum is σ = 43718976. Its totient is φ = 8029728.

The previous prime is 20297731. The next prime is 20297759. The reversal of 20297732 is 23779202.

It is not an unprimeable number, because it can be changed into a prime (20297731) 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, 27518 + ... + 28245.

It is an arithmetic number, because the mean of its divisors is an integer number (1821624).

Almost surely, 2^20297732 is an apocalyptic number.

It is an amenable number.

20297732 is an abundant number, since it is smaller than the sum of its proper divisors (23421244).

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

20297732 is a wasteful number, since it uses less digits than its factorization.

20297732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55787 (or 55785 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 20297732 is about 4505.3004339333. The cubic root of 20297732 is about 272.7820808771.

The spelling of 20297732 in words is "twenty million, two hundred ninety-seven thousand, seven hundred thirty-two".