21142330140 has 96 divisors (see below), whose sum is σ = 59474257920. Its totient is φ = 5611769856.

The previous prime is 21142330133. The next prime is 21142330147. The reversal of 21142330140 is 4103324112.

It is an interprime number because it is at equal distance from previous prime (21142330133) and next prime (21142330147).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21142330147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16028401 + ... + 16029719.

It is an arithmetic number, because the mean of its divisors is an integer number (619523520).

Almost surely, 2^21142330140 is an apocalyptic number.

21142330140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21142330140 is an abundant number, since it is smaller than the sum of its proper divisors (38331927780).

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

21142330140 is a wasteful number, since it uses less digits than its factorization.

21142330140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2371 (or 2369 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21142330140 its reverse (4103324112), we get a palindrome (25245654252).

The spelling of 21142330140 in words is "twenty-one billion, one hundred forty-two million, three hundred thirty thousand, one hundred forty".