13972901806 has 4 divisors (see below), whose sum is σ = 20959352712. Its totient is φ = 6986450902.

The previous prime is 13972901797. The next prime is 13972901807. The reversal of 13972901806 is 60810927931.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13972901807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3493225450 + ... + 3493225453.

It is an arithmetic number, because the mean of its divisors is an integer number (5239838178).

Almost surely, 2^13972901806 is an apocalyptic number.

13972901806 is a deficient number, since it is larger than the sum of its proper divisors (6986450906).

13972901806 is an equidigital number, since it uses as much as digits as its factorization.

13972901806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6986450905.

The product of its (nonzero) digits is 163296, while the sum is 46.

The spelling of 13972901806 in words is "thirteen billion, nine hundred seventy-two million, nine hundred one thousand, eight hundred six".