20754668140 has 24 divisors (see below), whose sum is σ = 43836745680. Its totient is φ = 8253878208.

The previous prime is 20754668131. The next prime is 20754668159. The reversal of 20754668140 is 4186645702.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2995770 + ... + 3002689.

It is an arithmetic number, because the mean of its divisors is an integer number (1826531070).

Almost surely, 2^20754668140 is an apocalyptic number.

20754668140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20754668140 is an abundant number, since it is smaller than the sum of its proper divisors (23082077540).

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

20754668140 is a wasteful number, since it uses less digits than its factorization.

20754668140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5998641 (or 5998639 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 43.

The spelling of 20754668140 in words is "twenty billion, seven hundred fifty-four million, six hundred sixty-eight thousand, one hundred forty".