21356732141 has 8 divisors (see below), whose sum is σ = 21417389760. Its totient is φ = 21296116512.

The previous prime is 21356732129. The next prime is 21356732147. The reversal of 21356732141 is 14123765312.

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

It is a cyclic number.

It is not a de Polignac number, because 21356732141 - 2²² = 21352537837 is a prime.

It is a super-2 number, since 2×21356732141² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21356732147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1203056 + ... + 1220678.

It is an arithmetic number, because the mean of its divisors is an integer number (2677173720).

Almost surely, 2^21356732141 is an apocalyptic number.

It is an amenable number.

21356732141 is a deficient number, since it is larger than the sum of its proper divisors (60657619).

21356732141 is a wasteful number, since it uses less digits than its factorization.

21356732141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20995.

The product of its digits is 30240, while the sum is 35.

The spelling of 21356732141 in words is "twenty-one billion, three hundred fifty-six million, seven hundred thirty-two thousand, one hundred forty-one".