19925742 has 16 divisors (see below), whose sum is σ = 40205520. Its totient is φ = 6582912.

The previous prime is 19925723. The next prime is 19925749. The reversal of 19925742 is 24752991.

It is a self number, because there is not a number n which added to its sum of digits gives 19925742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19925749) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 14017 + ... + 15372.

It is an arithmetic number, because the mean of its divisors is an integer number (2512845).

Almost surely, 2^19925742 is an apocalyptic number.

19925742 is an abundant number, since it is smaller than the sum of its proper divisors (20279778).

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

19925742 is a wasteful number, since it uses less digits than its factorization.

19925742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29507.

The product of its digits is 45360, while the sum is 39.

The square root of 19925742 is about 4463.8259374666. The cubic root of 19925742 is about 271.1053996502.

The spelling of 19925742 in words is "nineteen million, nine hundred twenty-five thousand, seven hundred forty-two".