20496377638 has 36 divisors (see below), whose sum is σ = 33943184604. Its totient is φ = 9205736800.

The previous prime is 20496377597. The next prime is 20496377639. The reversal of 20496377638 is 83677369402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20496377639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 87967170 + ... + 87967402.

It is an arithmetic number, because the mean of its divisors is an integer number (942866239).

Almost surely, 2^20496377638 is an apocalyptic number.

20496377638 is a deficient number, since it is larger than the sum of its proper divisors (13446806966).

20496377638 is an equidigital number, since it uses as much as digits as its factorization.

20496377638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 55.

The spelling of 20496377638 in words is "twenty billion, four hundred ninety-six million, three hundred seventy-seven thousand, six hundred thirty-eight".