21514511142 has 32 divisors (see below), whose sum is σ = 47817164160. Its totient is φ = 7170432840.

The previous prime is 21514511141. The next prime is 21514511173. The reversal of 21514511142 is 24111541512.

21514511142 is a `hidden beast` number, since 2 + 1 + 5 + 1 + 4 + 511 + 142 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21514511141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 389413 + ... + 441215.

It is an arithmetic number, because the mean of its divisors is an integer number (1494286380).

Almost surely, 2^21514511142 is an apocalyptic number.

21514511142 is an abundant number, since it is smaller than the sum of its proper divisors (26302653018).

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

21514511142 is a wasteful number, since it uses less digits than its factorization.

21514511142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59505 (or 59499 counting only the distinct ones).

The product of its digits is 1600, while the sum is 27.

The spelling of 21514511142 in words is "twenty-one billion, five hundred fourteen million, five hundred eleven thousand, one hundred forty-two".