20471572220 has 24 divisors (see below), whose sum is σ = 46898511408. Its totient is φ = 7444208000.

The previous prime is 20471572183. The next prime is 20471572223. The reversal of 20471572220 is 2227517402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20471572223) 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, 46526081 + ... + 46526520.

It is an arithmetic number, because the mean of its divisors is an integer number (1954104642).

Almost surely, 2^20471572220 is an apocalyptic number.

20471572220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20471572220 is an abundant number, since it is smaller than the sum of its proper divisors (26426939188).

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

20471572220 is a wasteful number, since it uses less digits than its factorization.

20471572220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93052621 (or 93052619 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 32.

The spelling of 20471572220 in words is "twenty billion, four hundred seventy-one million, five hundred seventy-two thousand, two hundred twenty".