20940127497 has 12 divisors (see below), whose sum is σ = 30984579444. Its totient is φ = 13619594880.

The previous prime is 20940127493. The next prime is 20940127499. The reversal of 20940127497 is 79472104902.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7070119056 + 13870008441 = 84084^2 + 117771^2 .

It is not a de Polignac number, because 20940127497 - 2² = 20940127493 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (20940127493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28373788 + ... + 28374525.

It is an arithmetic number, because the mean of its divisors is an integer number (2582048287).

Almost surely, 2^20940127497 is an apocalyptic number.

It is an amenable number.

20940127497 is a deficient number, since it is larger than the sum of its proper divisors (10044451947).

20940127497 is a wasteful number, since it uses less digits than its factorization.

20940127497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56748360 (or 56748357 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 20940127497 in words is "twenty billion, nine hundred forty million, one hundred twenty-seven thousand, four hundred ninety-seven".