20347955 has 8 divisors (see below), whose sum is σ = 25702800. Its totient is φ = 15421536.

The previous prime is 20347909. The next prime is 20347973. The reversal of 20347955 is 55974302.

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 20347955 - 2¹⁶ = 20282419 is a prime.

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, 107000 + ... + 107189.

It is an arithmetic number, because the mean of its divisors is an integer number (3212850).

Almost surely, 2^20347955 is an apocalyptic number.

20347955 is a deficient number, since it is larger than the sum of its proper divisors (5354845).

20347955 is a wasteful number, since it uses less digits than its factorization.

20347955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214213.

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 20347955 is about 4510.8707585122. The cubic root of 20347955 is about 273.0068785808.

The spelling of 20347955 in words is "twenty million, three hundred forty-seven thousand, nine hundred fifty-five".