21361415460 has 96 divisors (see below), whose sum is σ = 74570775552. Its totient is φ = 4438734720.

The previous prime is 21361415419. The next prime is 21361415473. The reversal of 21361415460 is 6451416312.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2307222 + ... + 2316461.

It is an arithmetic number, because the mean of its divisors is an integer number (776778912).

Almost surely, 2^21361415460 is an apocalyptic number.

21361415460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21361415460 is an abundant number, since it is smaller than the sum of its proper divisors (53209360092).

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

21361415460 is a wasteful number, since it uses less digits than its factorization.

21361415460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4623713 (or 4623711 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The spelling of 21361415460 in words is "twenty-one billion, three hundred sixty-one million, four hundred fifteen thousand, four hundred sixty".