20148399 has 16 divisors (see below), whose sum is σ = 30013440. Its totient is φ = 13358520.

The previous prime is 20148367. The next prime is 20148407. The reversal of 20148399 is 99384102.

It is not a de Polignac number, because 20148399 - 2⁵ = 20148367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20148329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3204 + ... + 7110.

It is an arithmetic number, because the mean of its divisors is an integer number (1875840).

Almost surely, 2^20148399 is an apocalyptic number.

20148399 is a deficient number, since it is larger than the sum of its proper divisors (9865041).

20148399 is a wasteful number, since it uses less digits than its factorization.

20148399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4107 (or 4101 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 20148399 is about 4488.6968041961. The cubic root of 20148399 is about 272.1114694144. Note that the first 3 decimals are identical.

The spelling of 20148399 in words is "twenty million, one hundred forty-eight thousand, three hundred ninety-nine".