20554672421 has 8 divisors (see below), whose sum is σ = 20601168000. Its totient is φ = 20508218640.

The previous prime is 20554672381. The next prime is 20554672441. The reversal of 20554672421 is 12427645502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20554672421 - 2¹⁸ = 20554410277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20554672441) 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, 1105520 + ... + 1123958.

It is an arithmetic number, because the mean of its divisors is an integer number (2575146000).

Almost surely, 2^20554672421 is an apocalyptic number.

It is an amenable number.

20554672421 is a deficient number, since it is larger than the sum of its proper divisors (46495579).

20554672421 is a wasteful number, since it uses less digits than its factorization.

20554672421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20899.

The product of its (nonzero) digits is 134400, while the sum is 38.

The spelling of 20554672421 in words is "twenty billion, five hundred fifty-four million, six hundred seventy-two thousand, four hundred twenty-one".