20821217895922 has 8 divisors (see below), whose sum is σ = 31231846545372. Its totient is φ = 10410602380800.

The previous prime is 20821217895871. The next prime is 20821217895943. The reversal of 20821217895922 is 22959871212802.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19313133198241 + 1508084697681 = 4394671^2 + 1228041^2 .

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

It is a super-2 number, since 2×20821217895922² (a number of 27 digits) contains 22 as substring.

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, 3402022 + ... + 7294942.

Almost surely, 2^{20821217895922} is an apocalyptic number.

20821217895922 is a deficient number, since it is larger than the sum of its proper divisors (10410628649450).

20821217895922 is a wasteful number, since it uses less digits than its factorization.

20821217895922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6567164.

The product of its (nonzero) digits is 5806080, while the sum is 58.

The spelling of 20821217895922 in words is "twenty trillion, eight hundred twenty-one billion, two hundred seventeen million, eight hundred ninety-five thousand, nine hundred twenty-two".