20346955 has 16 divisors (see below), whose sum is σ = 25258464. Its totient is φ = 15724800.

The previous prime is 20346923. The next prime is 20346983. The reversal of 20346955 is 55964302.

It is not a de Polignac number, because 20346955 - 2⁵ = 20346923 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 20346955.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21247 + ... + 22183.

It is an arithmetic number, because the mean of its divisors is an integer number (1578654).

Almost surely, 2^20346955 is an apocalyptic number.

20346955 is a deficient number, since it is larger than the sum of its proper divisors (4911509).

20346955 is a wasteful number, since it uses less digits than its factorization.

20346955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1086.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 20346955 is about 4510.7599138061. The cubic root of 20346955 is about 273.0024062010.

The spelling of 20346955 in words is "twenty million, three hundred forty-six thousand, nine hundred fifty-five".