13400203356 has 48 divisors (see below), whose sum is σ = 34817416480. Its totient is φ = 4456944000.

The previous prime is 13400203343. The next prime is 13400203357. The reversal of 13400203356 is 65330200431.

It is a happy number.

13400203356 is a `hidden beast` number, since 1 + 3 + 400 + 203 + 3 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13400203357) 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, 86395 + ... + 185106.

Almost surely, 2^13400203356 is an apocalyptic number.

It is an amenable number.

13400203356 is an abundant number, since it is smaller than the sum of its proper divisors (21417213124).

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

13400203356 is a wasteful number, since it uses less digits than its factorization.

13400203356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271971 (or 271963 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

Adding to 13400203356 its reverse (65330200431), we get a palindrome (78730403787).

The spelling of 13400203356 in words is "thirteen billion, four hundred million, two hundred three thousand, three hundred fifty-six".