19422740 has 24 divisors (see below), whose sum is σ = 42104832. Its totient is φ = 7518240.

The previous prime is 19422719. The next prime is 19422757. The reversal of 19422740 is 4722491.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 15044 + ... + 16283.

It is an arithmetic number, because the mean of its divisors is an integer number (1754368).

Almost surely, 2^19422740 is an apocalyptic number.

19422740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19422740 is an abundant number, since it is smaller than the sum of its proper divisors (22682092).

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

19422740 is a wasteful number, since it uses less digits than its factorization.

19422740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31367 (or 31365 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 19422740 is about 4407.1237786112. The cubic root of 19422740 is about 268.8046840229.

The spelling of 19422740 in words is "nineteen million, four hundred twenty-two thousand, seven hundred forty".