20471532 has 48 divisors (see below), whose sum is σ = 49846272. Its totient is φ = 6531840.

The previous prime is 20471497. The next prime is 20471579. The reversal of 20471532 is 23517402.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41793 + ... + 42279.

It is an arithmetic number, because the mean of its divisors is an integer number (1038464).

Almost surely, 2^20471532 is an apocalyptic number.

It is an amenable number.

20471532 is an abundant number, since it is smaller than the sum of its proper divisors (29374740).

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

20471532 is a wasteful number, since it uses less digits than its factorization.

20471532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638 (or 636 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 20471532 is about 4524.5477122028. The cubic root of 20471532 is about 273.5584377378.

Adding to 20471532 its reverse (23517402), we get a palindrome (43988934).

The spelling of 20471532 in words is "twenty million, four hundred seventy-one thousand, five hundred thirty-two".