20460406664442 has 64 divisors (see below), whose sum is σ = 42793696382976. Its totient is φ = 6509303021760.

The previous prime is 20460406664363. The next prime is 20460406664447. The reversal of 20460406664442 is 24446660406402.

It is a junction number, because it is equal to n+sod(n) for n = 20460406664391 and 20460406664400.

It is not an unprimeable number, because it can be changed into a prime (20460406664447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 140393092 + ... + 140538752.

It is an arithmetic number, because the mean of its divisors is an integer number (668651505984).

Almost surely, 2^{20460406664442} is an apocalyptic number.

20460406664442 is an abundant number, since it is smaller than the sum of its proper divisors (22333289718534).

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

20460406664442 is a wasteful number, since it uses less digits than its factorization.

20460406664442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147915.

The product of its (nonzero) digits is 5308416, while the sum is 48.

The spelling of 20460406664442 in words is "twenty trillion, four hundred sixty billion, four hundred six million, six hundred sixty-four thousand, four hundred forty-two".