19921914 has 24 divisors (see below), whose sum is σ = 43811040. Its totient is φ = 6541128.

The previous prime is 19921901. The next prime is 19921921. The reversal of 19921914 is 41912991.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7054 + ... + 9465.

It is an arithmetic number, because the mean of its divisors is an integer number (1825460).

Almost surely, 2^19921914 is an apocalyptic number.

19921914 is an abundant number, since it is smaller than the sum of its proper divisors (23889126).

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

19921914 is a wasteful number, since it uses less digits than its factorization.

19921914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16594 (or 16591 counting only the distinct ones).

The product of its digits is 5832, while the sum is 36.

The square root of 19921914 is about 4463.3971367110. The cubic root of 19921914 is about 271.0880375543.

The spelling of 19921914 in words is "nineteen million, nine hundred twenty-one thousand, nine hundred fourteen".