21571352654 has 8 divisors (see below), whose sum is σ = 33763856400. Its totient is φ = 10316733856.

The previous prime is 21571352653. The next prime is 21571352753. The reversal of 21571352654 is 45625317512.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21571352653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234471179 + ... + 234471270.

It is an arithmetic number, because the mean of its divisors is an integer number (4220482050).

Almost surely, 2^21571352654 is an apocalyptic number.

21571352654 is a deficient number, since it is larger than the sum of its proper divisors (12192503746).

21571352654 is a wasteful number, since it uses less digits than its factorization.

21571352654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468942474.

The product of its digits is 252000, while the sum is 41.

The spelling of 21571352654 in words is "twenty-one billion, five hundred seventy-one million, three hundred fifty-two thousand, six hundred fifty-four".