21621361431662 has 32 divisors (see below), whose sum is σ = 32790092306400. Its totient is φ = 10691578800000.

The previous prime is 21621361431647. The next prime is 21621361431757. The reversal of 21621361431662 is 26613416312612.

It is a super-2 number, since 2×21621361431662² (a number of 27 digits) contains 22 as substring.

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, 732887912 + ... + 732917412.

It is an arithmetic number, because the mean of its divisors is an integer number (1024690384575).

Almost surely, 2^{21621361431662} is an apocalyptic number.

21621361431662 is a deficient number, since it is larger than the sum of its proper divisors (11168730874738).

21621361431662 is a wasteful number, since it uses less digits than its factorization.

21621361431662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33572.

The product of its digits is 373248, while the sum is 44.

The spelling of 21621361431662 in words is "twenty-one trillion, six hundred twenty-one billion, three hundred sixty-one million, four hundred thirty-one thousand, six hundred sixty-two".