21625948410 has 32 divisors (see below), whose sum is σ = 56620665792. Its totient is φ = 5242654080.

The previous prime is 21625948403. The next prime is 21625948427. The reversal of 21625948410 is 1484952612.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32766259 + ... + 32766918.

It is an arithmetic number, because the mean of its divisors is an integer number (1769395806).

Almost surely, 2^21625948410 is an apocalyptic number.

21625948410 is an abundant number, since it is smaller than the sum of its proper divisors (34994717382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21625948410 is a wasteful number, since it uses less digits than its factorization.

21625948410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65533198.

The product of its (nonzero) digits is 138240, while the sum is 42.

The spelling of 21625948410 in words is "twenty-one billion, six hundred twenty-five million, nine hundred forty-eight thousand, four hundred ten".