21542432022 has 48 divisors (see below), whose sum is σ = 48722394240. Its totient is φ = 6871075200.

The previous prime is 21542431987. The next prime is 21542432029. The reversal of 21542432022 is 22023424512.

21542432022 is a `hidden beast` number, since 215 + 4 + 243 + 202 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21542432029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 167229 + ... + 266552.

It is an arithmetic number, because the mean of its divisors is an integer number (1015049880).

Almost surely, 2^21542432022 is an apocalyptic number.

21542432022 is an abundant number, since it is smaller than the sum of its proper divisors (27179962218).

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

21542432022 is a wasteful number, since it uses less digits than its factorization.

21542432022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433909 (or 433906 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 21542432022 its reverse (22023424512), we get a palindrome (43565856534).

The spelling of 21542432022 in words is "twenty-one billion, five hundred forty-two million, four hundred thirty-two thousand, twenty-two".