20154320412 has 24 divisors (see below), whose sum is σ = 47038607616. Its totient is φ = 6716412528.

The previous prime is 20154320393. The next prime is 20154320449. The reversal of 20154320412 is 21402345102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161748 + ... + 257819.

It is an arithmetic number, because the mean of its divisors is an integer number (1959941984).

Almost surely, 2^20154320412 is an apocalyptic number.

It is an amenable number.

20154320412 is an abundant number, since it is smaller than the sum of its proper divisors (26884287204).

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

20154320412 is a wasteful number, since it uses less digits than its factorization.

20154320412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423577 (or 423575 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

Adding to 20154320412 its reverse (21402345102), we get a palindrome (41556665514).

The spelling of 20154320412 in words is "twenty billion, one hundred fifty-four million, three hundred twenty thousand, four hundred twelve".