21621200152654 has 8 divisors (see below), whose sum is σ = 32463014669280. Its totient is φ = 10800195262896.

The previous prime is 21621200152631. The next prime is 21621200152709. The reversal of 21621200152654 is 45625100212612.

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

It is a super-2 number, since 2×21621200152654² (a number of 27 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, 5202404119 + ... + 5202408274.

It is an arithmetic number, because the mean of its divisors is an integer number (4057876833660).

Almost surely, 2^{21621200152654} is an apocalyptic number.

21621200152654 is a deficient number, since it is larger than the sum of its proper divisors (10841814516626).

21621200152654 is a wasteful number, since it uses less digits than its factorization.

21621200152654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10404813434.

The product of its (nonzero) digits is 57600, while the sum is 37.

The spelling of 21621200152654 in words is "twenty-one trillion, six hundred twenty-one billion, two hundred million, one hundred fifty-two thousand, six hundred fifty-four".