20899753 has 8 divisors (see below), whose sum is σ = 25142720. Its totient is φ = 16971120.

The previous prime is 20899751. The next prime is 20899757. The reversal of 20899753 is 35799802.

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 20899753 - 2¹ = 20899751 is a prime.

It is a super-2 number, since 2×20899753² = 873599350922018, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20899751) 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, 78438 + ... + 78703.

It is an arithmetic number, because the mean of its divisors is an integer number (3142840).

Almost surely, 2^20899753 is an apocalyptic number.

It is an amenable number.

20899753 is a deficient number, since it is larger than the sum of its proper divisors (4242967).

20899753 is a wasteful number, since it uses less digits than its factorization.

20899753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157167.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 20899753 is about 4571.6247658792. The cubic root of 20899753 is about 275.4527110774.

The spelling of 20899753 in words is "twenty million, eight hundred ninety-nine thousand, seven hundred fifty-three".