20402144132064 has 48 divisors (see below), whose sum is σ = 53556668500608. Its totient is φ = 6800582627712.

The previous prime is 20402144132057. The next prime is 20402144132087. The reversal of 20402144132064 is 46023144120402.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2968389 + ... + 7043835.

It is an arithmetic number, because the mean of its divisors is an integer number (1115763927096).

Almost surely, 2^{20402144132064} is an apocalyptic number.

20402144132064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20402144132064 is an abundant number, since it is smaller than the sum of its proper divisors (33154524368544).

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

20402144132064 is a wasteful number, since it uses less digits than its factorization.

20402144132064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4127607 (or 4127599 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 33.

Adding to 20402144132064 its reverse (46023144120402), we get a palindrome (66425288252466).

The spelling of 20402144132064 in words is "twenty trillion, four hundred two billion, one hundred forty-four million, one hundred thirty-two thousand, sixty-four".