20148636 has 24 divisors (see below), whose sum is σ = 48530944. Its totient is φ = 6499440.

The previous prime is 20148631. The next prime is 20148641. The reversal of 20148636 is 63684102.

It is an interprime number because it is at equal distance from previous prime (20148631) and next prime (20148641).

It is a super-3 number, since 3×20148636³ (a number of 23 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20148631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26710 + ... + 27453.

Almost surely, 2^20148636 is an apocalyptic number.

It is an amenable number.

20148636 is an abundant number, since it is smaller than the sum of its proper divisors (28382308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20148636 is a wasteful number, since it uses less digits than its factorization.

20148636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54201 (or 54199 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 20148636 is about 4488.7232037630. The cubic root of 20148636 is about 272.1125363340.

The spelling of 20148636 in words is "twenty million, one hundred forty-eight thousand, six hundred thirty-six".