20361740 has 24 divisors (see below), whose sum is σ = 48868512. Its totient is φ = 6981120.

The previous prime is 20361713. The next prime is 20361751. The reversal of 20361740 is 4716302.

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 7 ways as a sum of consecutive naturals, for example, 72581 + ... + 72860.

It is an arithmetic number, because the mean of its divisors is an integer number (2036188).

Almost surely, 2^20361740 is an apocalyptic number.

20361740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20361740 is an abundant number, since it is smaller than the sum of its proper divisors (28506772).

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

20361740 is a wasteful number, since it uses less digits than its factorization.

20361740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145457 (or 145455 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 20361740 is about 4512.3984753122. The cubic root of 20361740 is about 273.0685154101.

The spelling of 20361740 in words is "twenty million, three hundred sixty-one thousand, seven hundred forty".