21514142352 has 40 divisors (see below), whose sum is σ = 57371050240. Its totient is φ = 6940045440.

The previous prime is 21514142347. The next prime is 21514142389. The reversal of 21514142352 is 25324141512.

It is a super-2 number, since 2×21514142352² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7227727 + ... + 7230702.

It is an arithmetic number, because the mean of its divisors is an integer number (1434276256).

Almost surely, 2^21514142352 is an apocalyptic number.

It is an amenable number.

21514142352 is an abundant number, since it is smaller than the sum of its proper divisors (35856907888).

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

21514142352 is a wasteful number, since it uses less digits than its factorization.

21514142352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14458471 (or 14458465 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

Adding to 21514142352 its reverse (25324141512), we get a palindrome (46838283864).

The spelling of 21514142352 in words is "twenty-one billion, five hundred fourteen million, one hundred forty-two thousand, three hundred fifty-two".