20963487042 has 112 divisors (see below), whose sum is σ = 49096467000. Its totient is φ = 6704467200.

The previous prime is 20963487019. The next prime is 20963487043. The reversal of 20963487042 is 24078436902.

20963487042 is a `hidden beast` number, since 2 + 0 + 9 + 634 + 8 + 7 + 0 + 4 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1455498801 + 19507988241 = 38151^2 + 139671^2 .

It is not an unprimeable number, because it can be changed into a prime (20963487043) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 3643584 + ... + 3649332.

Almost surely, 2^20963487042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20963487042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24548233500).

20963487042 is an abundant number, since it is smaller than the sum of its proper divisors (28132979958).

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

20963487042 is an equidigital number, since it uses as much as digits as its factorization.

20963487042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5871 (or 5856 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

The spelling of 20963487042 in words is "twenty billion, nine hundred sixty-three million, four hundred eighty-seven thousand, forty-two".