19725942 has 32 divisors (see below), whose sum is σ = 40584960. Its totient is φ = 6389280.

The previous prime is 19725941. The next prime is 19725983. The reversal of 19725942 is 24952791.

It is a super-2 number, since 2×19725942² = 778225575574728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19725942.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19725941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36192 + ... + 36732.

It is an arithmetic number, because the mean of its divisors is an integer number (1268280).

Almost surely, 2^19725942 is an apocalyptic number.

19725942 is an abundant number, since it is smaller than the sum of its proper divisors (20859018).

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

19725942 is a wasteful number, since it uses less digits than its factorization.

19725942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708.

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

The square root of 19725942 is about 4441.3896473964. The cubic root of 19725942 is about 270.1962085470.

The spelling of 19725942 in words is "nineteen million, seven hundred twenty-five thousand, nine hundred forty-two".