20761678860 has 96 divisors (see below), whose sum is σ = 65899464960. Its totient is φ = 4841586432.

The previous prime is 20761678853. The next prime is 20761678871. The reversal of 20761678860 is 6887616702.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 685642 + ... + 715281.

It is an arithmetic number, because the mean of its divisors is an integer number (686452760).

Almost surely, 2^20761678860 is an apocalyptic number.

20761678860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20761678860 is an abundant number, since it is smaller than the sum of its proper divisors (45137786100).

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

20761678860 is a wasteful number, since it uses less digits than its factorization.

20761678860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1400967 (or 1400965 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 51.

The spelling of 20761678860 in words is "twenty billion, seven hundred sixty-one million, six hundred seventy-eight thousand, eight hundred sixty".