19402379 has 4 divisors (see below), whose sum is σ = 19521576. Its totient is φ = 19283184.

The previous prime is 19402349. The next prime is 19402381. The reversal of 19402379 is 97320491.

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

It is a cyclic number.

It is not a de Polignac number, because 19402379 - 2¹² = 19398283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19402309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59354 + ... + 59679.

It is an arithmetic number, because the mean of its divisors is an integer number (4880394).

Almost surely, 2^19402379 is an apocalyptic number.

19402379 is a deficient number, since it is larger than the sum of its proper divisors (119197).

19402379 is a wasteful number, since it uses less digits than its factorization.

19402379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119196.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 19402379 is about 4404.8131628935. The cubic root of 19402379 is about 268.7107212110.

The spelling of 19402379 in words is "nineteen million, four hundred two thousand, three hundred seventy-nine".