20945355 has 24 divisors (see below), whose sum is σ = 34113936. Its totient is φ = 10973760.

The previous prime is 20945321. The next prime is 20945363. The reversal of 20945355 is 55354902.

It is not a de Polignac number, because 20945355 - 2⁶ = 20945291 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75477 + ... + 75753.

It is an arithmetic number, because the mean of its divisors is an integer number (1421414).

Almost surely, 2^20945355 is an apocalyptic number.

20945355 is a deficient number, since it is larger than the sum of its proper divisors (13168581).

20945355 is an equidigital number, since it uses as much as digits as its factorization.

20945355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427 (or 356 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 20945355 is about 4576.6095529333. The cubic root of 20945355 is about 275.6529059420.

The spelling of 20945355 in words is "twenty million, nine hundred forty-five thousand, three hundred fifty-five".