21402063324 has 60 divisors (see below), whose sum is σ = 56897563800. Its totient is φ = 7013099232.

The previous prime is 21402063311. The next prime is 21402063373. The reversal of 21402063324 is 42336020412.

21402063324 is a `hidden beast` number, since 2 + 1 + 4 + 0 + 2 + 0 + 633 + 24 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 540679 + ... + 578910.

It is an arithmetic number, because the mean of its divisors is an integer number (948292730).

Almost surely, 2^21402063324 is an apocalyptic number.

It is an amenable number.

21402063324 is an abundant number, since it is smaller than the sum of its proper divisors (35495500476).

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

21402063324 is a wasteful number, since it uses less digits than its factorization.

21402063324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119664 (or 1119653 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

Adding to 21402063324 its reverse (42336020412), we get a palindrome (63738083736).

The spelling of 21402063324 in words is "twenty-one billion, four hundred two million, sixty-three thousand, three hundred twenty-four".