20697413760 has 128 divisors (see below), whose sum is σ = 73303401600. Its totient is φ = 5519305728.

The previous prime is 20697413749. The next prime is 20697413783. The reversal of 20697413760 is 6731479602.

20697413760 is a `hidden beast` number, since 206 + 9 + 74 + 1 + 376 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 581604 + ... + 616163.

It is an arithmetic number, because the mean of its divisors is an integer number (572682825).

Almost surely, 2^20697413760 is an apocalyptic number.

20697413760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20697413760 is an abundant number, since it is smaller than the sum of its proper divisors (52605987840).

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

20697413760 is a wasteful number, since it uses less digits than its factorization.

20697413760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197795 (or 1197777 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The spelling of 20697413760 in words is "twenty billion, six hundred ninety-seven million, four hundred thirteen thousand, seven hundred sixty".