21634152661142 has 8 divisors (see below), whose sum is σ = 37087118847696. Its totient is φ = 9271779711912.

The previous prime is 21634152661111. The next prime is 21634152661153. The reversal of 21634152661142 is 24116625143612.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×21634152661142² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21634152661093 and 21634152661102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 772648309313 + ... + 772648309340.

It is an arithmetic number, because the mean of its divisors is an integer number (4635889855962).

Almost surely, 2^{21634152661142} is an apocalyptic number.

21634152661142 is a deficient number, since it is larger than the sum of its proper divisors (15452966186554).

21634152661142 is a wasteful number, since it uses less digits than its factorization.

21634152661142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1545296618662.

The product of its digits is 414720, while the sum is 44.

The spelling of 21634152661142 in words is "twenty-one trillion, six hundred thirty-four billion, one hundred fifty-two million, six hundred sixty-one thousand, one hundred forty-two".