21552157486 has 8 divisors (see below), whose sum is σ = 32333411880. Its totient is φ = 10774353528.

The previous prime is 21552157481. The next prime is 21552157489. The reversal of 21552157486 is 68475125512.

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 (21552157481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 846936 + ... + 872011.

It is an arithmetic number, because the mean of its divisors is an integer number (4041676485).

Almost surely, 2^21552157486 is an apocalyptic number.

21552157486 is a deficient number, since it is larger than the sum of its proper divisors (10781254394).

21552157486 is a wasteful number, since it uses less digits than its factorization.

21552157486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1725218.

The product of its digits is 672000, while the sum is 46.

The spelling of 21552157486 in words is "twenty-one billion, five hundred fifty-two million, one hundred fifty-seven thousand, four hundred eighty-six".