21103302402 has 96 divisors (see below), whose sum is σ = 56500778880. Its totient is φ = 5543424000.

The previous prime is 21103302317. The next prime is 21103302433. The reversal of 21103302402 is 20420330112.

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

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 385474 + ... + 436802.

It is an arithmetic number, because the mean of its divisors is an integer number (588549780).

Almost surely, 2^21103302402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21103302402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28250389440).

21103302402 is an abundant number, since it is smaller than the sum of its proper divisors (35397476478).

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

21103302402 is a wasteful number, since it uses less digits than its factorization.

21103302402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51608 (or 51605 counting only the distinct ones).

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

Adding to 21103302402 its reverse (20420330112), we get a palindrome (41523632514).

The spelling of 21103302402 in words is "twenty-one billion, one hundred three million, three hundred two thousand, four hundred two".