20642089343544 has 48 divisors (see below), whose sum is σ = 55911363463800. Its totient is φ = 6879994315584.

The previous prime is 20642089343527. The next prime is 20642089343549. The reversal of 20642089343544 is 44534398024602.

20642089343544 is a `hidden beast` number, since 2 + 0 + 6 + 4 + 2 + 0 + 8 + 93 + 4 + 3 + 544 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20642089343549) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13917039 + ... + 15328670.

Almost surely, 2^{20642089343544} is an apocalyptic number.

20642089343544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20642089343544 is an abundant number, since it is smaller than the sum of its proper divisors (35269274120256).

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

20642089343544 is a wasteful number, since it uses less digits than its factorization.

20642089343544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29255524 (or 29255517 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 54.

The spelling of 20642089343544 in words is "twenty trillion, six hundred forty-two billion, eighty-nine million, three hundred forty-three thousand, five hundred forty-four".