20192540 has 12 divisors (see below), whose sum is σ = 42404376. Its totient is φ = 8077008.

The previous prime is 20192537. The next prime is 20192561. The reversal of 20192540 is 4529102.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 504794 + ... + 504833.

It is an arithmetic number, because the mean of its divisors is an integer number (3533698).

Almost surely, 2^20192540 is an apocalyptic number.

20192540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20192540 is an abundant number, since it is smaller than the sum of its proper divisors (22211836).

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

20192540 is a wasteful number, since it uses less digits than its factorization.

20192540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009636 (or 1009634 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 20192540 is about 4493.6110201040. The cubic root of 20192540 is about 272.3100379065.

The spelling of 20192540 in words is "twenty million, one hundred ninety-two thousand, five hundred forty".