22351720421357 has 2 divisors, whose sum is σ = 22351720421358. Its totient is φ = 22351720421356.

The previous prime is 22351720421347. The next prime is 22351720421453. The reversal of 22351720421357 is 75312402715322.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22231875674761 + 119844746596 = 4715069^2 + 346186^2 .

It is a cyclic number.

It is not a de Polignac number, because 22351720421357 - 2¹² = 22351720417261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22351720421347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11175860210678 + 11175860210679.

It is an arithmetic number, because the mean of its divisors is an integer number (11175860210679).

Almost surely, 2^{22351720421357} is an apocalyptic number.

It is an amenable number.

22351720421357 is a deficient number, since it is larger than the sum of its proper divisors (1).

22351720421357 is an equidigital number, since it uses as much as digits as its factorization.

22351720421357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 705600, while the sum is 44.

The spelling of 22351720421357 in words is "twenty-two trillion, three hundred fifty-one billion, seven hundred twenty million, four hundred twenty-one thousand, three hundred fifty-seven".