20148553 has 12 divisors (see below), whose sum is σ = 21875508. Its totient is φ = 18493440.

The previous prime is 20148547. The next prime is 20148581. The reversal of 20148553 is 35584102.

It can be written as a sum of positive squares in 2 ways, for example, as 17040384 + 3108169 = 4128^2 + 1763^2 .

It is not a de Polignac number, because 20148553 - 2⁵ = 20148521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20148503) 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, 31113 + ... + 31753.

It is an arithmetic number, because the mean of its divisors is an integer number (1822959).

Almost surely, 2^20148553 is an apocalyptic number.

It is an amenable number.

20148553 is a deficient number, since it is larger than the sum of its proper divisors (1726955).

20148553 is an equidigital number, since it uses as much as digits as its factorization.

20148553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744 (or 701 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 20148553 is about 4488.7139583627. The cubic root of 20148553 is about 272.1121626880.

The spelling of 20148553 in words is "twenty million, one hundred forty-eight thousand, five hundred fifty-three".