20442340421231 has 16 divisors (see below), whose sum is σ = 21527668262400. Its totient is φ = 19357956072000.

The previous prime is 20442340421219. The next prime is 20442340421287. The reversal of 20442340421231 is 13212404324402.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20442340421231 - 2³⁴ = 20425160552047 is a prime.

It is a super-2 number, since 2×20442340421231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20442340421201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 455760956 + ... + 455805806.

It is an arithmetic number, because the mean of its divisors is an integer number (1345479266400).

Almost surely, 2^{20442340421231} is an apocalyptic number.

20442340421231 is a deficient number, since it is larger than the sum of its proper divisors (1085327841169).

20442340421231 is a wasteful number, since it uses less digits than its factorization.

20442340421231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54830.

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 20442340421231 its reverse (13212404324402), we get a palindrome (33654744745633).

The spelling of 20442340421231 in words is "twenty trillion, four hundred forty-two billion, three hundred forty million, four hundred twenty-one thousand, two hundred thirty-one".