20012433420 has 48 divisors (see below), whose sum is σ = 64039788288. Its totient is φ = 4574270400.

The previous prime is 20012433407. The next prime is 20012433457. The reversal of 20012433420 is 2433421002.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 23823906 + ... + 23824745.

It is an arithmetic number, because the mean of its divisors is an integer number (1334162256).

Almost surely, 2^20012433420 is an apocalyptic number.

20012433420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012433420 is an abundant number, since it is smaller than the sum of its proper divisors (44027354868).

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

20012433420 is a wasteful number, since it uses less digits than its factorization.

20012433420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47648670 (or 47648668 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 20012433420 its reverse (2433421002), we get a palindrome (22445854422).

The spelling of 20012433420 in words is "twenty billion, twelve million, four hundred thirty-three thousand, four hundred twenty".