21353045802 has 32 divisors (see below), whose sum is σ = 47847616704. Its totient is φ = 6295737600.

The previous prime is 21353045761. The next prime is 21353045809. The reversal of 21353045802 is 20854035312.

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

It is not an unprimeable number, because it can be changed into a prime (21353045809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4369599 + ... + 4374482.

It is an arithmetic number, because the mean of its divisors is an integer number (1495238022).

Almost surely, 2^21353045802 is an apocalyptic number.

21353045802 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21353045802 is an abundant number, since it is smaller than the sum of its proper divisors (26494570902).

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

21353045802 is a wasteful number, since it uses less digits than its factorization.

21353045802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8744134.

The product of its (nonzero) digits is 28800, while the sum is 33.

The spelling of 21353045802 in words is "twenty-one billion, three hundred fifty-three million, forty-five thousand, eight hundred two".