12920542788 has 24 divisors (see below), whose sum is σ = 30171107008. Its totient is φ = 4303537056.

The previous prime is 12920542787. The next prime is 12920542837. The reversal of 12920542788 is 88724502921.

It is not an unprimeable number, because it can be changed into a prime (12920542781) 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, 397531 + ... + 428802.

Almost surely, 2^12920542788 is an apocalyptic number.

It is an amenable number.

12920542788 is an abundant number, since it is smaller than the sum of its proper divisors (17250564220).

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

12920542788 is a wasteful number, since it uses less digits than its factorization.

12920542788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827643 (or 827641 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 12920542788 in words is "twelve billion, nine hundred twenty million, five hundred forty-two thousand, seven hundred eighty-eight".