19974642 has 16 divisors (see below), whose sum is σ = 40219200. Its totient is φ = 6613232.

The previous prime is 19974637. The next prime is 19974673. The reversal of 19974642 is 24647991.

It is a junction number, because it is equal to n+sod(n) for n = 19974594 and 19974603.

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, 10278 + ... + 12065.

It is an arithmetic number, because the mean of its divisors is an integer number (2513700).

Almost surely, 2^19974642 is an apocalyptic number.

19974642 is an abundant number, since it is smaller than the sum of its proper divisors (20244558).

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

19974642 is a wasteful number, since it uses less digits than its factorization.

19974642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22497.

The product of its digits is 108864, while the sum is 42.

The square root of 19974642 is about 4469.2999451816. The cubic root of 19974642 is about 271.3269928041.

The spelling of 19974642 in words is "nineteen million, nine hundred seventy-four thousand, six hundred forty-two".