20934999 has 12 divisors (see below), whose sum is σ = 30394000. Its totient is φ = 13885344.

The previous prime is 20934961. The next prime is 20935009. The reversal of 20934999 is 99943902.

It is not a de Polignac number, because 20934999 - 2⁸ = 20934743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20934919) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4054 + ... + 7635.

Almost surely, 2^20934999 is an apocalyptic number.

20934999 is a deficient number, since it is larger than the sum of its proper divisors (9459001).

20934999 is a wasteful number, since it uses less digits than its factorization.

20934999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11894 (or 11891 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The square root of 20934999 is about 4575.4780078151. The cubic root of 20934999 is about 275.6074681492.

The spelling of 20934999 in words is "twenty million, nine hundred thirty-four thousand, nine hundred ninety-nine".