20734641 has 6 divisors (see below), whose sum is σ = 29950050. Its totient is φ = 13823088.

The previous prime is 20734633. The next prime is 20734663. The reversal of 20734641 is 14643702.

It can be written as a sum of positive squares in only one way, i.e., 16573041 + 4161600 = 4071^2 + 2040^2 .

It is not a de Polignac number, because 20734641 - 2³ = 20734633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20734631) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1151916 + ... + 1151933.

It is an arithmetic number, because the mean of its divisors is an integer number (4991675).

Almost surely, 2^20734641 is an apocalyptic number.

It is an amenable number.

20734641 is a deficient number, since it is larger than the sum of its proper divisors (9215409).

20734641 is a wasteful number, since it uses less digits than its factorization.

20734641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2303855 (or 2303852 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 20734641 is about 4553.5306082204. The cubic root of 20734641 is about 274.7254162813.

The spelling of 20734641 in words is "twenty million, seven hundred thirty-four thousand, six hundred forty-one".