20894874 has 128 divisors (see below), whose sum is σ = 58060800. Its totient is φ = 4939200.

The previous prime is 20894869. The next prime is 20894911. The reversal of 20894874 is 47849802.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 294259 + ... + 294329.

It is an arithmetic number, because the mean of its divisors is an integer number (453600).

Almost surely, 2^20894874 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20894874, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29030400).

20894874 is an abundant number, since it is smaller than the sum of its proper divisors (37165926).

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

20894874 is a wasteful number, since it uses less digits than its factorization.

20894874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121 (or 107 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 20894874 is about 4571.0911170092. The cubic root of 20894874 is about 275.4312748054.

The spelling of 20894874 in words is "twenty million, eight hundred ninety-four thousand, eight hundred seventy-four".