19947902 has 16 divisors (see below), whose sum is σ = 34119792. Its totient is φ = 8664960.

The previous prime is 19947887. The next prime is 19947913. The reversal of 19947902 is 20974991.

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 19947902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22124 + ... + 23007.

It is an arithmetic number, because the mean of its divisors is an integer number (2132487).

Almost surely, 2^19947902 is an apocalyptic number.

19947902 is a deficient number, since it is larger than the sum of its proper divisors (14171890).

19947902 is a wasteful number, since it uses less digits than its factorization.

19947902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45163.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 19947902 is about 4466.3074233644. The cubic root of 19947902 is about 271.2058638290.

The spelling of 19947902 in words is "nineteen million, nine hundred forty-seven thousand, nine hundred two".