21140148 has 24 divisors (see below), whose sum is σ = 49469728. Its totient is φ = 7026336.

The previous prime is 21140123. The next prime is 21140149. The reversal of 21140148 is 84104112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21140149) 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, 2115 + ... + 6837.

Almost surely, 2^21140148 is an apocalyptic number.

It is an amenable number.

21140148 is an abundant number, since it is smaller than the sum of its proper divisors (28329580).

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

21140148 is a wasteful number, since it uses less digits than its factorization.

21140148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5103 (or 5101 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 21140148 is about 4597.8416675653. The cubic root of 21140148 is about 276.5047997536.

The spelling of 21140148 in words is "twenty-one million, one hundred forty thousand, one hundred forty-eight".