21627587145 has 8 divisors (see below), whose sum is σ = 34604139456. Its totient is φ = 11534713136.

The previous prime is 21627587129. The next prime is 21627587147. The reversal of 21627587145 is 54178572612.

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 21627587145 - 2⁴ = 21627587129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21627587094 and 21627587103.

It is not an unprimeable number, because it can be changed into a prime (21627587147) 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, 720919557 + ... + 720919586.

It is an arithmetic number, because the mean of its divisors is an integer number (4325517432).

Almost surely, 2^21627587145 is an apocalyptic number.

It is an amenable number.

21627587145 is a deficient number, since it is larger than the sum of its proper divisors (12976552311).

21627587145 is a wasteful number, since it uses less digits than its factorization.

21627587145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1441839151.

The product of its digits is 940800, while the sum is 48.

The spelling of 21627587145 in words is "twenty-one billion, six hundred twenty-seven million, five hundred eighty-seven thousand, one hundred forty-five".