21301478496 has 120 divisors (see below), whose sum is σ = 64175353704. Its totient is φ = 6927275520.

The previous prime is 21301478491. The next prime is 21301478563. The reversal of 21301478496 is 69487410312.

21301478496 is a `hidden beast` number, since 2 + 13 + 0 + 147 + 8 + 496 = 666.

It is a super-2 number, since 2×21301478496² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21301478491) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6051 + ... + 206493.

Almost surely, 2^21301478496 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21301478496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32087676852).

21301478496 is an abundant number, since it is smaller than the sum of its proper divisors (42873875208).

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

21301478496 is a wasteful number, since it uses less digits than its factorization.

21301478496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200506 (or 200489 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 21301478496 in words is "twenty-one billion, three hundred one million, four hundred seventy-eight thousand, four hundred ninety-six".