21325021726 has 8 divisors (see below), whose sum is σ = 32103011880. Its totient is φ = 10624017768.

The previous prime is 21325021703. The next prime is 21325021763. The reversal of 21325021726 is 62712052312.

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

It is a super-2 number, since 2×21325021726² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19245856 + ... + 19246963.

It is an arithmetic number, because the mean of its divisors is an integer number (4012876485).

Almost surely, 2^21325021726 is an apocalyptic number.

21325021726 is a deficient number, since it is larger than the sum of its proper divisors (10777990154).

21325021726 is a wasteful number, since it uses less digits than its factorization.

21325021726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38493098.

The product of its (nonzero) digits is 10080, while the sum is 31.

The spelling of 21325021726 in words is "twenty-one billion, three hundred twenty-five million, twenty-one thousand, seven hundred twenty-six".