21803107479 has 8 divisors (see below), whose sum is σ = 29238850032. Its totient is φ = 14451384960.

The previous prime is 21803107471. The next prime is 21803107483. The reversal of 21803107479 is 97470130812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21803107479 - 2³ = 21803107471 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 21803107479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21803107471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21004402 + ... + 21005439.

It is an arithmetic number, because the mean of its divisors is an integer number (3654856254).

Almost surely, 2^21803107479 is an apocalyptic number.

21803107479 is a deficient number, since it is larger than the sum of its proper divisors (7435742553).

21803107479 is a wasteful number, since it uses less digits than its factorization.

21803107479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42010017.

The product of its (nonzero) digits is 84672, while the sum is 42.

The spelling of 21803107479 in words is "twenty-one billion, eight hundred three million, one hundred seven thousand, four hundred seventy-nine".