20472443420 has 48 divisors (see below), whose sum is σ = 50508245088. Its totient is φ = 6871868160.

The previous prime is 20472443389. The next prime is 20472443423. The reversal of 20472443420 is 2434427402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20472443423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3576239 + ... + 3581958.

It is an arithmetic number, because the mean of its divisors is an integer number (1052255106).

Almost surely, 2^20472443420 is an apocalyptic number.

20472443420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20472443420 is an abundant number, since it is smaller than the sum of its proper divisors (30035801668).

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

20472443420 is a wasteful number, since it uses less digits than its factorization.

20472443420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7158230 (or 7158228 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 32.

The spelling of 20472443420 in words is "twenty billion, four hundred seventy-two million, four hundred forty-three thousand, four hundred twenty".