20147574140 has 24 divisors (see below), whose sum is σ = 44798724432. Its totient is φ = 7584968960.

The previous prime is 20147574133. The next prime is 20147574151. The reversal of 20147574140 is 4147574102.

It is a self number, because there is not a number n which added to its sum of digits gives 20147574140.

It is a congruent number.

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, 29628446 + ... + 29629125.

It is an arithmetic number, because the mean of its divisors is an integer number (1866613518).

Almost surely, 2^20147574140 is an apocalyptic number.

20147574140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20147574140 is an abundant number, since it is smaller than the sum of its proper divisors (24651150292).

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

20147574140 is a wasteful number, since it uses less digits than its factorization.

20147574140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59257597 (or 59257595 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 35.

The spelling of 20147574140 in words is "twenty billion, one hundred forty-seven million, five hundred seventy-four thousand, one hundred forty".