21311003148 has 48 divisors (see below), whose sum is σ = 50017013760. Its totient is φ = 7062163200.

The previous prime is 21311003143. The next prime is 21311003149. The reversal of 21311003148 is 84130011312.

It is a super-3 number, since 3×21311003148³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (21311003141) 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, 1550868 + ... + 1564548.

It is an arithmetic number, because the mean of its divisors is an integer number (1042021120).

Almost surely, 2^21311003148 is an apocalyptic number.

It is an amenable number.

21311003148 is an abundant number, since it is smaller than the sum of its proper divisors (28706010612).

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

21311003148 is a wasteful number, since it uses less digits than its factorization.

21311003148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14438 (or 14436 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The spelling of 21311003148 in words is "twenty-one billion, three hundred eleven million, three thousand, one hundred forty-eight".