21020192043672 has 64 divisors (see below), whose sum is σ = 52602362920800. Its totient is φ = 6999815347200.

The previous prime is 21020192043659. The next prime is 21020192043673. The reversal of 21020192043672 is 27634029102012.

It is a self number, because there is not a number n which added to its sum of digits gives 21020192043672.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020192043673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147587118 + ... + 147729474.

Almost surely, 2^{21020192043672} is an apocalyptic number.

It is an amenable number.

21020192043672 is an abundant number, since it is smaller than the sum of its proper divisors (31582170877128).

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

21020192043672 is a wasteful number, since it uses less digits than its factorization.

21020192043672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148396 (or 148392 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The spelling of 21020192043672 in words is "twenty-one trillion, twenty billion, one hundred ninety-two million, forty-three thousand, six hundred seventy-two".