21214036500542 has 32 divisors (see below), whose sum is σ = 32874610026240. Its totient is φ = 10256400080640.

The previous prime is 21214036500539. The next prime is 21214036500557. The reversal of 21214036500542 is 24500563041212.

It is a congruent number.

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, 491305658 + ... + 491348834.

It is an arithmetic number, because the mean of its divisors is an integer number (1027331563320).

Almost surely, 2^{21214036500542} is an apocalyptic number.

21214036500542 is a deficient number, since it is larger than the sum of its proper divisors (11660573525698).

21214036500542 is a wasteful number, since it uses less digits than its factorization.

21214036500542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49556.

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 21214036500542 its reverse (24500563041212), we get a palindrome (45714599541754).

The spelling of 21214036500542 in words is "twenty-one trillion, two hundred fourteen billion, thirty-six million, five hundred thousand, five hundred forty-two".