20747299860 has 72 divisors (see below), whose sum is σ = 71923977216. Its totient is φ = 4742239680.

The previous prime is 20747299843. The next prime is 20747299873. The reversal of 20747299860 is 6899274702.

20747299860 is a `hidden beast` number, since 2 + 0 + 7 + 472 + 99 + 86 + 0 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 20747299797 and 20747299806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8231796 + ... + 8234315.

It is an arithmetic number, because the mean of its divisors is an integer number (998944128).

Almost surely, 2^20747299860 is an apocalyptic number.

20747299860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20747299860 is an abundant number, since it is smaller than the sum of its proper divisors (51176677356).

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

20747299860 is a wasteful number, since it uses less digits than its factorization.

20747299860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16466133 (or 16466128 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The spelling of 20747299860 in words is "twenty billion, seven hundred forty-seven million, two hundred ninety-nine thousand, eight hundred sixty".