20458641 has 16 divisors (see below), whose sum is σ = 31246208. Its totient is φ = 11664000.

The previous prime is 20458591. The next prime is 20458643. The reversal of 20458641 is 14685402.

It is not a de Polignac number, because 20458641 - 2⁹ = 20458129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20458599 and 20458608.

It is not an unprimeable number, because it can be changed into a prime (20458643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11811 + ... + 13431.

It is an arithmetic number, because the mean of its divisors is an integer number (1952888).

Almost surely, 2^20458641 is an apocalyptic number.

20458641 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20458641 is a deficient number, since it is larger than the sum of its proper divisors (10787567).

20458641 is a wasteful number, since it uses less digits than its factorization.

20458641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2232.

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 20458641 is about 4523.1229255902. The cubic root of 20458641 is about 273.5010054251.

The spelling of 20458641 in words is "twenty million, four hundred fifty-eight thousand, six hundred forty-one".