20551042644652 has 24 divisors (see below), whose sum is σ = 38740377060000. Its totient is φ = 9482753930496.

The previous prime is 20551042644623. The next prime is 20551042644653. The reversal of 20551042644652 is 25644624015502.

It is a happy number.

It is a super-2 number, since 2×20551042644652² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20551042644653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48593152 + ... + 49014247.

It is an arithmetic number, because the mean of its divisors is an integer number (1614182377500).

Almost surely, 2^{20551042644652} is an apocalyptic number.

It is an amenable number.

20551042644652 is a deficient number, since it is larger than the sum of its proper divisors (18189334415348).

20551042644652 is a wasteful number, since it uses less digits than its factorization.

20551042644652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97611465 (or 97611463 counting only the distinct ones).

The product of its (nonzero) digits is 2304000, while the sum is 46.

The spelling of 20551042644652 in words is "twenty trillion, five hundred fifty-one billion, forty-two million, six hundred forty-four thousand, six hundred fifty-two".