21600300402 has 32 divisors (see below), whose sum is σ = 50824238400. Its totient is φ = 6776564544.

The previous prime is 21600300353. The next prime is 21600300409. The reversal of 21600300402 is 20400300612.

It is a happy number.

21600300402 is a `hidden beast` number, since 21 + 600 + 3 + 0 + 0 + 40 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21600300409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11763952 + ... + 11765787.

It is an arithmetic number, because the mean of its divisors is an integer number (1588257450).

Almost surely, 2^21600300402 is an apocalyptic number.

21600300402 is an abundant number, since it is smaller than the sum of its proper divisors (29223937998).

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

21600300402 is a wasteful number, since it uses less digits than its factorization.

21600300402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23529767 (or 23529761 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The spelling of 21600300402 in words is "twenty-one billion, six hundred million, three hundred thousand, four hundred two".