21225654532 has 12 divisors (see below), whose sum is σ = 37212805840. Its totient is φ = 10593424296.

The previous prime is 21225654529. The next prime is 21225654533. The reversal of 21225654532 is 23545652212.

It is a junction number, because it is equal to n+sod(n) for n = 21225654491 and 21225654500.

It is not an unprimeable number, because it can be changed into a prime (21225654533) 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, 4848282 + ... + 4852657.

Almost surely, 2^21225654532 is an apocalyptic number.

It is an amenable number.

21225654532 is a deficient number, since it is larger than the sum of its proper divisors (15987151308).

21225654532 is a wasteful number, since it uses less digits than its factorization.

21225654532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9701490 (or 9701488 counting only the distinct ones).

The product of its digits is 144000, while the sum is 37.

The spelling of 21225654532 in words is "twenty-one billion, two hundred twenty-five million, six hundred fifty-four thousand, five hundred thirty-two".