21213415166354 has 16 divisors (see below), whose sum is σ = 33723951721056. Its totient is φ = 9973285224000.

The previous prime is 21213415166347. The next prime is 21213415166399. The reversal of 21213415166354 is 45366151431212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 296788232 + ... + 296859699.

It is an arithmetic number, because the mean of its divisors is an integer number (2107746982566).

Almost surely, 2^{21213415166354} is an apocalyptic number.

21213415166354 is a deficient number, since it is larger than the sum of its proper divisors (12510536554702).

21213415166354 is a wasteful number, since it uses less digits than its factorization.

21213415166354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593649001.

The product of its digits is 518400, while the sum is 44.

Adding to 21213415166354 its reverse (45366151431212), we get a palindrome (66579566597566).

The spelling of 21213415166354 in words is "twenty-one trillion, two hundred thirteen billion, four hundred fifteen million, one hundred sixty-six thousand, three hundred fifty-four".