19420074 has 48 divisors (see below), whose sum is σ = 45077760. Its totient is φ = 6259680.

The previous prime is 19420061. The next prime is 19420081. The reversal of 19420074 is 47002491.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14422 + ... + 15710.

It is an arithmetic number, because the mean of its divisors is an integer number (939120).

Almost surely, 2^19420074 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19420074, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22538880).

19420074 is an abundant number, since it is smaller than the sum of its proper divisors (25657686).

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

19420074 is a wasteful number, since it uses less digits than its factorization.

19420074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337 (or 1325 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 19420074 is about 4406.8213033886. The cubic root of 19420074 is about 268.7923845897.

The spelling of 19420074 in words is "nineteen million, four hundred twenty thousand, seventy-four".