54102420021 has 32 divisors (see below), whose sum is σ = 78055262208. Its totient is φ = 33135575040.

The previous prime is 54102420019. The next prime is 54102420041. The reversal of 54102420021 is 12002420145.

It is not a de Polignac number, because 54102420021 - 2¹ = 54102420019 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54102420021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54102420041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21157275 + ... + 21159831.

It is an arithmetic number, because the mean of its divisors is an integer number (2439226944).

Almost surely, 2^54102420021 is an apocalyptic number.

It is an amenable number.

54102420021 is a deficient number, since it is larger than the sum of its proper divisors (23952842187).

54102420021 is a wasteful number, since it uses less digits than its factorization.

54102420021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4941.

The product of its (nonzero) digits is 640, while the sum is 21.

Adding to 54102420021 its reverse (12002420145), we get a palindrome (66104840166).

The spelling of 54102420021 in words is "fifty-four billion, one hundred two million, four hundred twenty thousand, twenty-one".