20445140034 has 48 divisors (see below), whose sum is σ = 48350221920. Its totient is φ = 6192247680.

The previous prime is 20445140033. The next prime is 20445140071. The reversal of 20445140034 is 43004154402.

It is a happy number.

20445140034 is a `hidden beast` number, since 204 + 4 + 51 + 400 + 3 + 4 = 666.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20445140033) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 365754 + ... + 417930.

It is an arithmetic number, because the mean of its divisors is an integer number (1007296290).

Almost surely, 2^20445140034 is an apocalyptic number.

20445140034 is an abundant number, since it is smaller than the sum of its proper divisors (27905081886).

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

20445140034 is a wasteful number, since it uses less digits than its factorization.

20445140034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54175 (or 54172 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 20445140034 its reverse (43004154402), we get a palindrome (63449294436).

The spelling of 20445140034 in words is "twenty billion, four hundred forty-five million, one hundred forty thousand, thirty-four".