21725900696 has 8 divisors (see below), whose sum is σ = 40736063820. Its totient is φ = 10862950344.

The previous prime is 21725900689. The next prime is 21725900701. The reversal of 21725900696 is 69600952712.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×21725900696² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21725900696.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1357868786 + ... + 1357868801.

Almost surely, 2^21725900696 is an apocalyptic number.

It is an amenable number.

21725900696 is a deficient number, since it is larger than the sum of its proper divisors (19010163124).

21725900696 is a wasteful number, since it uses less digits than its factorization.

21725900696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2715737593 (or 2715737589 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 47.

The spelling of 21725900696 in words is "twenty-one billion, seven hundred twenty-five million, nine hundred thousand, six hundred ninety-six".