20506076772 has 24 divisors (see below), whose sum is σ = 48312054336. Its totient is φ = 6768995808.

The previous prime is 20506076761. The next prime is 20506076797. The reversal of 20506076772 is 27767060502.

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, 8294103 + ... + 8296574.

It is an arithmetic number, because the mean of its divisors is an integer number (2013002264).

Almost surely, 2^20506076772 is an apocalyptic number.

It is an amenable number.

20506076772 is an abundant number, since it is smaller than the sum of its proper divisors (27805977564).

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

20506076772 is a wasteful number, since it uses less digits than its factorization.

20506076772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16590787 (or 16590785 counting only the distinct ones).

The product of its (nonzero) digits is 246960, while the sum is 42.

The spelling of 20506076772 in words is "twenty billion, five hundred six million, seventy-six thousand, seven hundred seventy-two".