20020531355 has 72 divisors (see below), whose sum is σ = 29116405584. Its totient is φ = 13102566400.

The previous prime is 20020531337. The next prime is 20020531381. The reversal of 20020531355 is 55313502002.

It is not a de Polignac number, because 20020531355 - 2¹⁸ = 20020269211 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 8407265 + ... + 8409645.

It is an arithmetic number, because the mean of its divisors is an integer number (404394522).

Almost surely, 2^20020531355 is an apocalyptic number.

20020531355 is a deficient number, since it is larger than the sum of its proper divisors (9095874229).

20020531355 is a wasteful number, since it uses less digits than its factorization.

20020531355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2477 (or 2437 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 26.

The spelling of 20020531355 in words is "twenty billion, twenty million, five hundred thirty-one thousand, three hundred fifty-five".