21506142744714 has 32 divisors (see below), whose sum is σ = 43327848695040. Its totient is φ = 7116124257792.

The previous prime is 21506142744689. The next prime is 21506142744781. The reversal of 21506142744714 is 41744724160512.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22375167 + ... + 23316525.

It is an arithmetic number, because the mean of its divisors is an integer number (1353995271720).

Almost surely, 2^{21506142744714} is an apocalyptic number.

21506142744714 is an abundant number, since it is smaller than the sum of its proper divisors (21821705950326).

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

21506142744714 is a wasteful number, since it uses less digits than its factorization.

21506142744714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 969294.

The product of its (nonzero) digits is 1505280, while the sum is 48.

The spelling of 21506142744714 in words is "twenty-one trillion, five hundred six billion, one hundred forty-two million, seven hundred forty-four thousand, seven hundred fourteen".