20955445 has 8 divisors (see below), whose sum is σ = 28738944. Its totient is φ = 14369424.

The previous prime is 20955439. The next prime is 20955457. The reversal of 20955445 is 54455902.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20955445 - 2⁵ = 20955413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20955445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299329 + ... + 299398.

It is an arithmetic number, because the mean of its divisors is an integer number (3592368).

Almost surely, 2^20955445 is an apocalyptic number.

It is an amenable number.

20955445 is a deficient number, since it is larger than the sum of its proper divisors (7783499).

20955445 is an equidigital number, since it uses as much as digits as its factorization.

20955445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598739.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 20955445 is about 4577.7117646265. The cubic root of 20955445 is about 275.6971622353.

The spelling of 20955445 in words is "twenty million, nine hundred fifty-five thousand, four hundred forty-five".