20377481880642 has 64 divisors (see below), whose sum is σ = 42388293095424. Its totient is φ = 6523774470720.

The previous prime is 20377481880617. The next prime is 20377481880649. The reversal of 20377481880642 is 24608818477302.

It is a happy number.

It is a super-2 number, since 2×20377481880642² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20377481880649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12623133 + ... + 14145615.

It is an arithmetic number, because the mean of its divisors is an integer number (662317079616).

Almost surely, 2^{20377481880642} is an apocalyptic number.

20377481880642 is an abundant number, since it is smaller than the sum of its proper divisors (22010811214782).

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

20377481880642 is a wasteful number, since it uses less digits than its factorization.

20377481880642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1523063.

The product of its (nonzero) digits is 28901376, while the sum is 60.

The spelling of 20377481880642 in words is "twenty trillion, three hundred seventy-seven billion, four hundred eighty-one million, eight hundred eighty thousand, six hundred forty-two".