21214040442510 has 32 divisors (see below), whose sum is σ = 51136027633440. Its totient is φ = 5632374054528.

The previous prime is 21214040442443. The next prime is 21214040442523. The reversal of 21214040442510 is 1524404041212.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 1543955317 + ... + 1543969056.

It is an arithmetic number, because the mean of its divisors is an integer number (1598000863545).

Almost surely, 2^{21214040442510} is an apocalyptic number.

21214040442510 is an abundant number, since it is smaller than the sum of its proper divisors (29921987190930).

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

21214040442510 is a wasteful number, since it uses less digits than its factorization.

21214040442510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3087924612.

The product of its (nonzero) digits is 10240, while the sum is 30.

Adding to 21214040442510 its reverse (1524404041212), we get a palindrome (22738444483722).

The spelling of 21214040442510 in words is "twenty-one trillion, two hundred fourteen billion, forty million, four hundred forty-two thousand, five hundred ten".