20900754 has 60 divisors (see below), whose sum is σ = 54500094. Its totient is φ = 5969376.

The previous prime is 20900753. The next prime is 20900773. The reversal of 20900754 is 45700902.

It can be written as a sum of positive squares in only one way, i.e., 20007729 + 893025 = 4473^2 + 945^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20900753) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 6622 + ... + 9254.

Almost surely, 2^20900754 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20900754, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27250047).

20900754 is an abundant number, since it is smaller than the sum of its proper divisors (33599340).

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

20900754 is a wasteful number, since it uses less digits than its factorization.

20900754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661 (or 2645 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 20900754 is about 4571.7342442447. The cubic root of 20900754 is about 275.4571086375.

The spelling of 20900754 in words is "twenty million, nine hundred thousand, seven hundred fifty-four".