20764229140 has 24 divisors (see below), whose sum is σ = 43824009600. Its totient is φ = 8263952928.

The previous prime is 20764229117. The next prime is 20764229141. The reversal of 20764229140 is 4192246702.

It is a self number, because there is not a number n which added to its sum of digits gives 20764229140.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20764229141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2604592 + ... + 2612551.

It is an arithmetic number, because the mean of its divisors is an integer number (1826000400).

Almost surely, 2^20764229140 is an apocalyptic number.

20764229140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20764229140 is an abundant number, since it is smaller than the sum of its proper divisors (23059780460).

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

20764229140 is a wasteful number, since it uses less digits than its factorization.

20764229140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5217351 (or 5217349 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 20764229140 in words is "twenty billion, seven hundred sixty-four million, two hundred twenty-nine thousand, one hundred forty".