20452781776 has 40 divisors (see below), whose sum is σ = 46392905664. Its totient is φ = 8551683840.

The previous prime is 20452781771. The next prime is 20452781801. The reversal of 20452781776 is 67718725402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20452781771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2222410 + ... + 2231593.

Almost surely, 2^20452781776 is an apocalyptic number.

It is an amenable number.

20452781776 is an abundant number, since it is smaller than the sum of its proper divisors (25940123888).

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

20452781776 is a wasteful number, since it uses less digits than its factorization.

20452781776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4454059 (or 4454053 counting only the distinct ones).

The product of its (nonzero) digits is 1317120, while the sum is 49.

The spelling of 20452781776 in words is "twenty billion, four hundred fifty-two million, seven hundred eighty-one thousand, seven hundred seventy-six".