13365620426 has 32 divisors (see below), whose sum is σ = 21196505088. Its totient is φ = 6310851120.

The previous prime is 13365620423. The next prime is 13365620431. The reversal of 13365620426 is 62402656331.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 13365620426.

It is not an unprimeable number, because it can be changed into a prime (13365620423) 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, 4218695 + ... + 4221861.

It is an arithmetic number, because the mean of its divisors is an integer number (662390784).

Almost surely, 2^13365620426 is an apocalyptic number.

13365620426 is a deficient number, since it is larger than the sum of its proper divisors (7830884662).

13365620426 is a wasteful number, since it uses less digits than its factorization.

13365620426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4826.

The product of its (nonzero) digits is 155520, while the sum is 38.

The spelling of 13365620426 in words is "thirteen billion, three hundred sixty-five million, six hundred twenty thousand, four hundred twenty-six".