21230250140 has 48 divisors (see below), whose sum is σ = 48649235040. Its totient is φ = 7718081280.

The previous prime is 21230250127. The next prime is 21230250143. The reversal of 21230250140 is 4105203212.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230250143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1031066 + ... + 1051454.

It is an arithmetic number, because the mean of its divisors is an integer number (1013525730).

Almost surely, 2^21230250140 is an apocalyptic number.

21230250140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21230250140 is an abundant number, since it is smaller than the sum of its proper divisors (27418984900).

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

21230250140 is a wasteful number, since it uses less digits than its factorization.

21230250140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25142 (or 25140 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 21230250140 its reverse (4105203212), we get a palindrome (25335453352).

The spelling of 21230250140 in words is "twenty-one billion, two hundred thirty million, two hundred fifty thousand, one hundred forty".