19420974 has 12 divisors (see below), whose sum is σ = 42078816. Its totient is φ = 6473652.

The previous prime is 19420943. The next prime is 19420979. The reversal of 19420974 is 47902491.

It is a super-2 number, since 2×19420974² = 754348462217352, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19420979) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 539454 + ... + 539489.

It is an arithmetic number, because the mean of its divisors is an integer number (3506568).

Almost surely, 2^19420974 is an apocalyptic number.

19420974 is an abundant number, since it is smaller than the sum of its proper divisors (22657842).

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

19420974 is a wasteful number, since it uses less digits than its factorization.

19420974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078951 (or 1078948 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 19420974 is about 4406.9234166253. The cubic root of 19420974 is about 268.7965368123.

The spelling of 19420974 in words is "nineteen million, four hundred twenty thousand, nine hundred seventy-four".