21140452000 has 96 divisors (see below), whose sum is σ = 54997684560. Its totient is φ = 7958732800.

The previous prime is 21140451971. The next prime is 21140452013. The reversal of 21140452000 is 25404112.

It can be written as a sum of positive squares in 8 ways, for example, as 598683024 + 20541768976 = 24468^2 + 143324^2 .

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, 87445 + ... + 223444.

Almost surely, 2^21140452000 is an apocalyptic number.

21140452000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21140452000 is an abundant number, since it is smaller than the sum of its proper divisors (33857232560).

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

21140452000 is a wasteful number, since it uses less digits than its factorization.

21140452000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310931 (or 310913 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

Adding to 21140452000 its reverse (25404112), we get a palindrome (21165856112).

The spelling of 21140452000 in words is "twenty-one billion, one hundred forty million, four hundred fifty-two thousand".