20461641 has 4 divisors (see below), whose sum is σ = 27282192. Its totient is φ = 13641092.

The previous prime is 20461633. The next prime is 20461673. The reversal of 20461641 is 14616402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20461641 - 2³ = 20461633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20461631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3410271 + ... + 3410276.

It is an arithmetic number, because the mean of its divisors is an integer number (6820548).

Almost surely, 2^20461641 is an apocalyptic number.

It is an amenable number.

20461641 is a deficient number, since it is larger than the sum of its proper divisors (6820551).

20461641 is an equidigital number, since it uses as much as digits as its factorization.

20461641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6820550.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 20461641 is about 4523.4545427140. The cubic root of 20461641 is about 273.5143732552.

The spelling of 20461641 in words is "twenty million, four hundred sixty-one thousand, six hundred forty-one".