20542004140 has 48 divisors (see below), whose sum is σ = 49377226752. Its totient is φ = 7032056256.

The previous prime is 20542004123. The next prime is 20542004173. The reversal of 20542004140 is 4140024502.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22812 + ... + 203971.

It is an arithmetic number, because the mean of its divisors is an integer number (1028692224).

Almost surely, 2^20542004140 is an apocalyptic number.

20542004140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20542004140 is an abundant number, since it is smaller than the sum of its proper divisors (28835222612).

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

20542004140 is a wasteful number, since it uses less digits than its factorization.

20542004140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227446 (or 227444 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

Adding to 20542004140 its reverse (4140024502), we get a palindrome (24682028642).

The spelling of 20542004140 in words is "twenty billion, five hundred forty-two million, four thousand, one hundred forty".