21442023402357 has 16 divisors (see below), whose sum is σ = 29836286392320. Its totient is φ = 13671384090672.

The previous prime is 21442023402337. The next prime is 21442023402361. The reversal of 21442023402357 is 75320432024412.

It is not a de Polignac number, because 21442023402357 - 2¹¹ = 21442023400309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21442023402337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19812873 + ... + 20867054.

It is an arithmetic number, because the mean of its divisors is an integer number (1864767899520).

Almost surely, 2^{21442023402357} is an apocalyptic number.

It is an amenable number.

21442023402357 is a deficient number, since it is larger than the sum of its proper divisors (8394262989963).

21442023402357 is a wasteful number, since it uses less digits than its factorization.

21442023402357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40687592.

The product of its (nonzero) digits is 322560, while the sum is 39.

Adding to 21442023402357 its reverse (75320432024412), we get a palindrome (96762455426769).

The spelling of 21442023402357 in words is "twenty-one trillion, four hundred forty-two billion, twenty-three million, four hundred two thousand, three hundred fifty-seven".