20051616761 has 12 divisors (see below), whose sum is σ = 22044003072. Its totient is φ = 18225603000.

The previous prime is 20051616703. The next prime is 20051616763. The reversal of 20051616761 is 16761615002.

It is not a de Polignac number, because 20051616761 - 2¹⁰ = 20051615737 is a prime.

It is a super-2 number, since 2×20051616761² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20051616763) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 971216 + ... + 991646.

It is an arithmetic number, because the mean of its divisors is an integer number (1837000256).

Almost surely, 2^20051616761 is an apocalyptic number.

It is an amenable number.

20051616761 is a deficient number, since it is larger than the sum of its proper divisors (1992386311).

20051616761 is a wasteful number, since it uses less digits than its factorization.

20051616761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28564 (or 28553 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The spelling of 20051616761 in words is "twenty billion, fifty-one million, six hundred sixteen thousand, seven hundred sixty-one".