20740874740 has 48 divisors (see below), whose sum is σ = 44346067920. Its totient is φ = 8146298880.

The previous prime is 20740874723. The next prime is 20740874741. The reversal of 20740874740 is 4747804702.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 455139556 + 20285735184 = 21334^2 + 142428^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20740874741) 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, 709126 + ... + 737794.

It is an arithmetic number, because the mean of its divisors is an integer number (923876415).

Almost surely, 2^20740874740 is an apocalyptic number.

20740874740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20740874740 is an abundant number, since it is smaller than the sum of its proper divisors (23605193180).

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

20740874740 is a wasteful number, since it uses less digits than its factorization.

20740874740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29332 (or 29330 counting only the distinct ones).

The product of its (nonzero) digits is 351232, while the sum is 43.

The spelling of 20740874740 in words is "twenty billion, seven hundred forty million, eight hundred seventy-four thousand, seven hundred forty".