20740262497 has 16 divisors (see below), whose sum is σ = 23129366400. Its totient is φ = 18482238720.

The previous prime is 20740262453. The next prime is 20740262509. The reversal of 20740262497 is 79426204702.

It is a cyclic number.

It is not a de Polignac number, because 20740262497 - 2²³ = 20731873889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20740262407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 573879 + ... + 608947.

It is an arithmetic number, because the mean of its divisors is an integer number (1445585400).

Almost surely, 2^20740262497 is an apocalyptic number.

It is an amenable number.

20740262497 is a deficient number, since it is larger than the sum of its proper divisors (2389103903).

20740262497 is a wasteful number, since it uses less digits than its factorization.

20740262497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36936.

The product of its (nonzero) digits is 338688, while the sum is 43.

The spelling of 20740262497 in words is "twenty billion, seven hundred forty million, two hundred sixty-two thousand, four hundred ninety-seven".