21467153732745 has 128 divisors (see below), whose sum is σ = 41930831609856. Its totient is φ = 9154927558656.

The previous prime is 21467153732741. The next prime is 21467153732749. The reversal of 21467153732745 is 54723735176412.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21467153732741) and next prime (21467153732749).

It is not a de Polignac number, because 21467153732745 - 2² = 21467153732741 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21467153732741) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 105125532 + ... + 105329538.

It is an arithmetic number, because the mean of its divisors is an integer number (327584621952).

Almost surely, 2^{21467153732745} is an apocalyptic number.

It is an amenable number.

21467153732745 is a deficient number, since it is larger than the sum of its proper divisors (20463677877111).

21467153732745 is a wasteful number, since it uses less digits than its factorization.

21467153732745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204559.

The product of its digits is 29635200, while the sum is 57.

The spelling of 21467153732745 in words is "twenty-one trillion, four hundred sixty-seven billion, one hundred fifty-three million, seven hundred thirty-two thousand, seven hundred forty-five".