20162545780 has 48 divisors (see below), whose sum is σ = 47998298880. Its totient is φ = 7052807808.

The previous prime is 20162545681. The next prime is 20162545787. The reversal of 20162545780 is 8754526102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20162545787) 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 15 ways as a sum of consecutive naturals, for example, 2035804 + ... + 2045683.

It is an arithmetic number, because the mean of its divisors is an integer number (999964560).

Almost surely, 2^20162545780 is an apocalyptic number.

20162545780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20162545780 is an abundant number, since it is smaller than the sum of its proper divisors (27835753100).

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

20162545780 is a wasteful number, since it uses less digits than its factorization.

20162545780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4081528 (or 4081526 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 40.

The spelling of 20162545780 in words is "twenty billion, one hundred sixty-two million, five hundred forty-five thousand, seven hundred eighty".