20731152 has 40 divisors (see below), whose sum is σ = 57676864. Its totient is φ = 6378624.

The previous prime is 20731133. The next prime is 20731153. The reversal of 20731152 is 25113702.

It is not an unprimeable number, because it can be changed into a prime (20731153) 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, 15988 + ... + 17235.

Almost surely, 2^20731152 is an apocalyptic number.

It is an amenable number.

20731152 is an abundant number, since it is smaller than the sum of its proper divisors (36945712).

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

20731152 is a wasteful number, since it uses less digits than its factorization.

20731152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33247 (or 33241 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 20731152 is about 4553.1474827859. The cubic root of 20731152 is about 274.7100061480.

Adding to 20731152 its reverse (25113702), we get a palindrome (45844854).

The spelling of 20731152 in words is "twenty million, seven hundred thirty-one thousand, one hundred fifty-two".