20275140464 has 30 divisors (see below), whose sum is σ = 41459444640. Its totient is φ = 9604011168.

The previous prime is 20275140451. The next prime is 20275140469. The reversal of 20275140464 is 46404157202.

It is a happy number.

It is a super-2 number, since 2×20275140464² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20275140469) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1749344 + ... + 1760895.

It is an arithmetic number, because the mean of its divisors is an integer number (1381981488).

Almost surely, 2^20275140464 is an apocalyptic number.

It is an amenable number.

20275140464 is an abundant number, since it is smaller than the sum of its proper divisors (21184304176).

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

20275140464 is a wasteful number, since it uses less digits than its factorization.

20275140464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3510285 (or 3510260 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 35.

Adding to 20275140464 its reverse (46404157202), we get a palindrome (66679297666).

The spelling of 20275140464 in words is "twenty billion, two hundred seventy-five million, one hundred forty thousand, four hundred sixty-four".