21627530642 has 16 divisors (see below), whose sum is σ = 32501312640. Its totient is φ = 10793778192.

The previous prime is 21627530641. The next prime is 21627530723. The reversal of 21627530642 is 24603572612.

It is a junction number, because it is equal to n+sod(n) for n = 21627530596 and 21627530605.

It is not an unprimeable number, because it can be changed into a prime (21627530641) 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, 3417293 + ... + 3423615.

It is an arithmetic number, because the mean of its divisors is an integer number (2031332040).

Almost surely, 2^21627530642 is an apocalyptic number.

21627530642 is a deficient number, since it is larger than the sum of its proper divisors (10873781998).

21627530642 is a wasteful number, since it uses less digits than its factorization.

21627530642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9217.

The product of its (nonzero) digits is 120960, while the sum is 38.

The spelling of 21627530642 in words is "twenty-one billion, six hundred twenty-seven million, five hundred thirty thousand, six hundred forty-two".