20747299859 has 32 divisors (see below), whose sum is σ = 24559114944. Its totient is φ = 17278894080.

The previous prime is 20747299843. The next prime is 20747299873. The reversal of 20747299859 is 95899274702.

It is a cyclic number.

It is not a de Polignac number, because 20747299859 - 2⁴ = 20747299843 is a prime.

It is a super-2 number, since 2×20747299859² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20747299889) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18573569 + ... + 18574685.

It is an arithmetic number, because the mean of its divisors is an integer number (767472342).

Almost surely, 2^20747299859 is an apocalyptic number.

20747299859 is a deficient number, since it is larger than the sum of its proper divisors (3811815085).

20747299859 is a wasteful number, since it uses less digits than its factorization.

20747299859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2007.

The product of its (nonzero) digits is 22861440, while the sum is 62.

The spelling of 20747299859 in words is "twenty billion, seven hundred forty-seven million, two hundred ninety-nine thousand, eight hundred fifty-nine".