21143114340 has 48 divisors (see below), whose sum is σ = 59454839808. Its totient is φ = 5613961984.

The previous prime is 21143114339. The next prime is 21143114383. The reversal of 21143114340 is 4341134112.

It is a self number, because there is not a number n which added to its sum of digits gives 21143114340.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 742212 + ... + 770171.

It is an arithmetic number, because the mean of its divisors is an integer number (1238642496).

Almost surely, 2^21143114340 is an apocalyptic number.

21143114340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21143114340 is an abundant number, since it is smaller than the sum of its proper divisors (38311725468).

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

21143114340 is a wasteful number, since it uses less digits than its factorization.

21143114340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512628 (or 1512626 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21143114340 its reverse (4341134112), we get a palindrome (25484248452).

The spelling of 21143114340 in words is "twenty-one billion, one hundred forty-three million, one hundred fourteen thousand, three hundred forty".