20411431020 has 72 divisors (see below), whose sum is σ = 63082904976. Its totient is φ = 5340346752.

The previous prime is 20411431013. The next prime is 20411431037. The reversal of 20411431020 is 2013411402.

20411431020 is a `hidden beast` number, since 204 + 11 + 431 + 0 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 20411430984 and 20411431002.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1060242 + ... + 1079321.

It is an arithmetic number, because the mean of its divisors is an integer number (876151458).

Almost surely, 2^20411431020 is an apocalyptic number.

20411431020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20411431020 is an abundant number, since it is smaller than the sum of its proper divisors (42671473956).

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

20411431020 is a wasteful number, since it uses less digits than its factorization.

20411431020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2139631 (or 2139626 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 20411431020 its reverse (2013411402), we get a palindrome (22424842422).

The spelling of 20411431020 in words is "twenty billion, four hundred eleven million, four hundred thirty-one thousand, twenty".