21143054748 has 24 divisors (see below), whose sum is σ = 49346157952. Its totient is φ = 7045918704.

The previous prime is 21143054741. The next prime is 21143054749. The reversal of 21143054748 is 84745034112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21143054741) 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, 170440 + ... + 267087.

Almost surely, 2^21143054748 is an apocalyptic number.

It is an amenable number.

21143054748 is an abundant number, since it is smaller than the sum of its proper divisors (28203103204).

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

21143054748 is a wasteful number, since it uses less digits than its factorization.

21143054748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441561 (or 441559 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 39.

The spelling of 21143054748 in words is "twenty-one billion, one hundred forty-three million, fifty-four thousand, seven hundred forty-eight".