21623545132126 has 32 divisors (see below), whose sum is σ = 37346810227200. Its totient is φ = 9197861670816.

The previous prime is 21623545132073. The next prime is 21623545132129. The reversal of 21623545132126 is 62123154532612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21623545132129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1363426 + ... + 6716101.

It is an arithmetic number, because the mean of its divisors is an integer number (1167087819600).

Almost surely, 2^{21623545132126} is an apocalyptic number.

21623545132126 is a deficient number, since it is larger than the sum of its proper divisors (15723265095074).

21623545132126 is a wasteful number, since it uses less digits than its factorization.

21623545132126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8080968.

The product of its digits is 518400, while the sum is 43.

Adding to 21623545132126 its reverse (62123154532612), we get a palindrome (83746699664738).

The spelling of 21623545132126 in words is "twenty-one trillion, six hundred twenty-three billion, five hundred forty-five million, one hundred thirty-two thousand, one hundred twenty-six".