19861402 has 32 divisors (see below), whose sum is σ = 33566400. Its totient is φ = 8737920.

The previous prime is 19861381. The next prime is 19861411. The reversal of 19861402 is 20416891.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133224 + ... + 133372.

It is an arithmetic number, because the mean of its divisors is an integer number (1048950).

Almost surely, 2^19861402 is an apocalyptic number.

19861402 is a deficient number, since it is larger than the sum of its proper divisors (13704998).

19861402 is a wasteful number, since it uses less digits than its factorization.

19861402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 19861402 is about 4456.6132881371. The cubic root of 19861402 is about 270.8132862374.

The spelling of 19861402 in words is "nineteen million, eight hundred sixty-one thousand, four hundred two".