19974534 has 32 divisors (see below), whose sum is σ = 42488064. Its totient is φ = 6246240.

The previous prime is 19974517. The next prime is 19974547. The reversal of 19974534 is 43547991.

It is a congruent 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, 5949 + ... + 8679.

It is an arithmetic number, because the mean of its divisors is an integer number (1327752).

Almost surely, 2^19974534 is an apocalyptic number.

19974534 is an abundant number, since it is smaller than the sum of its proper divisors (22513530).

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

19974534 is a wasteful number, since it uses less digits than its factorization.

19974534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2812.

The product of its digits is 136080, while the sum is 42.

The square root of 19974534 is about 4469.2878627361. The cubic root of 19974534 is about 271.3265037947.

The spelling of 19974534 in words is "nineteen million, nine hundred seventy-four thousand, five hundred thirty-four".