20944491 has 4 divisors (see below), whose sum is σ = 27925992. Its totient is φ = 13962992.

The previous prime is 20944489. The next prime is 20944541. The reversal of 20944491 is 19444902.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20944491 - 2¹ = 20944489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20944291) 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, 3490746 + ... + 3490751.

It is an arithmetic number, because the mean of its divisors is an integer number (6981498).

Almost surely, 2^20944491 is an apocalyptic number.

20944491 is a deficient number, since it is larger than the sum of its proper divisors (6981501).

20944491 is an equidigital number, since it uses as much as digits as its factorization.

20944491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6981500.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 20944491 is about 4576.5151589392. The cubic root of 20944491 is about 275.6491156444.

The spelling of 20944491 in words is "twenty million, nine hundred forty-four thousand, four hundred ninety-one".