20899954 has 8 divisors (see below), whose sum is σ = 31374720. Its totient is φ = 10441716.

The previous prime is 20899951. The next prime is 20899961. The reversal of 20899954 is 45999802.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20899951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234 + ... + 6469.

It is an arithmetic number, because the mean of its divisors is an integer number (3921840).

Almost surely, 2^20899954 is an apocalyptic number.

20899954 is a deficient number, since it is larger than the sum of its proper divisors (10474766).

20899954 is a wasteful number, since it uses less digits than its factorization.

20899954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8264.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 20899954 is about 4571.6467492579. The cubic root of 20899954 is about 275.4535941152.

The spelling of 20899954 in words is "twenty million, eight hundred ninety-nine thousand, nine hundred fifty-four".