20104995 has 8 divisors (see below), whose sum is σ = 32168016. Its totient is φ = 10722656.

The previous prime is 20104993. The next prime is 20105009. The reversal of 20104995 is 59940102.

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 20104995 - 2¹ = 20104993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20104993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 670152 + ... + 670181.

It is an arithmetic number, because the mean of its divisors is an integer number (4021002).

Almost surely, 2^20104995 is an apocalyptic number.

20104995 is a deficient number, since it is larger than the sum of its proper divisors (12063021).

20104995 is a wasteful number, since it uses less digits than its factorization.

20104995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340341.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 20104995 is about 4483.8593867337. The cubic root of 20104995 is about 271.9159333268.

The spelling of 20104995 in words is "twenty million, one hundred four thousand, nine hundred ninety-five".