20145748 has 24 divisors (see below), whose sum is σ = 42662592. Its totient is φ = 8125824.

The previous prime is 20145743. The next prime is 20145767. The reversal of 20145748 is 84754102.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20145743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20686 + ... + 21637.

It is an arithmetic number, because the mean of its divisors is an integer number (1777608).

Almost surely, 2^20145748 is an apocalyptic number.

20145748 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20145748 is an abundant number, since it is smaller than the sum of its proper divisors (22516844).

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

20145748 is a wasteful number, since it uses less digits than its factorization.

20145748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42351 (or 42349 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 20145748 is about 4488.4014971925. The cubic root of 20145748 is about 272.0995346507.

The spelling of 20145748 in words is "twenty million, one hundred forty-five thousand, seven hundred forty-eight".