20738899 has 4 divisors (see below), whose sum is σ = 21830440. Its totient is φ = 19647360.

The previous prime is 20738849. The next prime is 20738903. The reversal of 20738899 is 99883702.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20738899 - 2¹⁵ = 20706131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20738849) 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, 545742 + ... + 545779.

It is an arithmetic number, because the mean of its divisors is an integer number (5457610).

Almost surely, 2^20738899 is an apocalyptic number.

20738899 is a deficient number, since it is larger than the sum of its proper divisors (1091541).

20738899 is a wasteful number, since it uses less digits than its factorization.

20738899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091540.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 20738899 is about 4553.9981335086. The cubic root of 20738899 is about 274.7442205737.

The spelling of 20738899 in words is "twenty million, seven hundred thirty-eight thousand, eight hundred ninety-nine".