20461221012264 has 96 divisors (see below), whose sum is σ = 51935490290880. Its totient is φ = 6717631278336.

The previous prime is 20461221012251. The next prime is 20461221012293. The reversal of 20461221012264 is 46221012216402.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1362529684 + ... + 1362544700.

It is an arithmetic number, because the mean of its divisors is an integer number (540994690530).

Almost surely, 2^{20461221012264} is an apocalyptic number.

20461221012264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20461221012264 is an abundant number, since it is smaller than the sum of its proper divisors (31474269278616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20461221012264 is a wasteful number, since it uses less digits than its factorization.

20461221012264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27807 (or 27736 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

Adding to 20461221012264 its reverse (46221012216402), we get a palindrome (66682233228666).

The spelling of 20461221012264 in words is "twenty trillion, four hundred sixty-one billion, two hundred twenty-one million, twelve thousand, two hundred sixty-four".