13953621603 has 16 divisors (see below), whose sum is σ = 19876334720. Its totient is φ = 8681276736.

The previous prime is 13953621497. The next prime is 13953621611. The reversal of 13953621603 is 30612635931.

It is not a de Polignac number, because 13953621603 - 2⁹ = 13953621091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13953611603) 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, 1823050 + ... + 1830687.

It is an arithmetic number, because the mean of its divisors is an integer number (1242270920).

Almost surely, 2^13953621603 is an apocalyptic number.

13953621603 is a deficient number, since it is larger than the sum of its proper divisors (5922713117).

13953621603 is a wasteful number, since it uses less digits than its factorization.

13953621603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3653826.

The product of its (nonzero) digits is 87480, while the sum is 39.

The spelling of 13953621603 in words is "thirteen billion, nine hundred fifty-three million, six hundred twenty-one thousand, six hundred three".