21492148848 has 20 divisors (see below), whose sum is σ = 55521384648. Its totient is φ = 7164049600.

The previous prime is 21492148829. The next prime is 21492148859. The reversal of 21492148848 is 84884129412.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21492148848.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223876503 + ... + 223876598.

Almost surely, 2^21492148848 is an apocalyptic number.

It is an amenable number.

21492148848 is an abundant number, since it is smaller than the sum of its proper divisors (34029235800).

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

21492148848 is a wasteful number, since it uses less digits than its factorization.

21492148848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447753112 (or 447753106 counting only the distinct ones).

The product of its digits is 1179648, while the sum is 51.

The spelling of 21492148848 in words is "twenty-one billion, four hundred ninety-two million, one hundred forty-eight thousand, eight hundred forty-eight".