13618472021 has 16 divisors (see below), whose sum is σ = 17005178880. Its totient is φ = 10595356080.

The previous prime is 13618471967. The next prime is 13618472027. The reversal of 13618472021 is 12027481631.

It is a cyclic number.

It is not a de Polignac number, because 13618472021 - 2¹⁰ = 13618470997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13618472027) 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, 86861 + ... + 186498.

It is an arithmetic number, because the mean of its divisors is an integer number (1062823680).

Almost surely, 2^13618472021 is an apocalyptic number.

13618472021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13618472021 is a deficient number, since it is larger than the sum of its proper divisors (3386706859).

13618472021 is a wasteful number, since it uses less digits than its factorization.

13618472021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274024.

The product of its (nonzero) digits is 16128, while the sum is 35.

The spelling of 13618472021 in words is "thirteen billion, six hundred eighteen million, four hundred seventy-two thousand, twenty-one".