20542361670 has 64 divisors (see below), whose sum is σ = 57662784000. Its totient is φ = 5189647968.

The previous prime is 20542361669. The next prime is 20542361677. The reversal of 20542361670 is 7616324502.

20542361670 is a `hidden beast` number, since 2 + 0 + 542 + 36 + 16 + 70 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20542361677) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1997050 + ... + 2007309.

It is an arithmetic number, because the mean of its divisors is an integer number (900981000).

Almost surely, 2^20542361670 is an apocalyptic number.

20542361670 is an abundant number, since it is smaller than the sum of its proper divisors (37120422330).

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

20542361670 is a wasteful number, since it uses less digits than its factorization.

20542361670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004394 (or 4004388 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 36.

The spelling of 20542361670 in words is "twenty billion, five hundred forty-two million, three hundred sixty-one thousand, six hundred seventy".