20706955 has 4 divisors (see below), whose sum is σ = 24848352. Its totient is φ = 16565560.

The previous prime is 20706947. The next prime is 20706971. The reversal of 20706955 is 55960702.

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

It is not a de Polignac number, because 20706955 - 2³ = 20706947 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 20706955.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2070691 + ... + 2070700.

It is an arithmetic number, because the mean of its divisors is an integer number (6212088).

Almost surely, 2^20706955 is an apocalyptic number.

20706955 is a deficient number, since it is larger than the sum of its proper divisors (4141397).

20706955 is an equidigital number, since it uses as much as digits as its factorization.

20706955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4141396.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 20706955 is about 4550.4895341051. The cubic root of 20706955 is about 274.6030858019.

It can be divided in two parts, 2070 and 6955, that added together give a square (9025 = 95²).

The spelling of 20706955 in words is "twenty million, seven hundred six thousand, nine hundred fifty-five".