21014142855 has 32 divisors (see below), whose sum is σ = 35094933504. Its totient is φ = 10717065216.

The previous prime is 21014142839. The next prime is 21014142857. The reversal of 21014142855 is 55824141012.

It is not a de Polignac number, because 21014142855 - 2⁴ = 21014142839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21014142857) 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, 1527367 + ... + 1541063.

It is an arithmetic number, because the mean of its divisors is an integer number (1096716672).

Almost surely, 2^21014142855 is an apocalyptic number.

21014142855 is a deficient number, since it is larger than the sum of its proper divisors (14080790649).

21014142855 is a wasteful number, since it uses less digits than its factorization.

21014142855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18175.

The product of its (nonzero) digits is 12800, while the sum is 33.

Adding to 21014142855 its reverse (55824141012), we get a palindrome (76838283867).

The spelling of 21014142855 in words is "twenty-one billion, fourteen million, one hundred forty-two thousand, eight hundred fifty-five".