20974941 has 24 divisors (see below), whose sum is σ = 33686016. Its totient is φ = 12489120.

The previous prime is 20974937. The next prime is 20974951. The reversal of 20974941 is 14947902.

It is not a de Polignac number, because 20974941 - 2² = 20974937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20974896 and 20974905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20974901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 736 + ... + 6518.

It is an arithmetic number, because the mean of its divisors is an integer number (1403584).

Almost surely, 2^20974941 is an apocalyptic number.

It is an amenable number.

20974941 is a deficient number, since it is larger than the sum of its proper divisors (12711075).

20974941 is a wasteful number, since it uses less digits than its factorization.

20974941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5833 (or 5830 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 20974941 is about 4579.8407177543. The cubic root of 20974941 is about 275.7826344654.

The spelling of 20974941 in words is "twenty million, nine hundred seventy-four thousand, nine hundred forty-one".