20131213432 has 32 divisors (see below), whose sum is σ = 41183607600. Its totient is φ = 9149190400.

The previous prime is 20131213423. The next prime is 20131213433. The reversal of 20131213432 is 23431213102.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131213433) 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, 799044 + ... + 823852.

Almost surely, 2^20131213432 is an apocalyptic number.

20131213432 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20131213432 is an abundant number, since it is smaller than the sum of its proper divisors (21052394168).

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

20131213432 is a wasteful number, since it uses less digits than its factorization.

20131213432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34047 (or 34043 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 20131213432 its reverse (23431213102), we get a palindrome (43562426534).

The spelling of 20131213432 in words is "twenty billion, one hundred thirty-one million, two hundred thirteen thousand, four hundred thirty-two".