20452359081 has 24 divisors (see below), whose sum is σ = 34256297152. Its totient is φ = 10624600800.

The previous prime is 20452359077. The next prime is 20452359113. The reversal of 20452359081 is 18095325402.

It is not a de Polignac number, because 20452359081 - 2² = 20452359077 is a prime.

It is a super-2 number, since 2×20452359081² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20452359041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4021930 + ... + 4027011.

Almost surely, 2^20452359081 is an apocalyptic number.

20452359081 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20452359081 is a deficient number, since it is larger than the sum of its proper divisors (13803938071).

20452359081 is a wasteful number, since it uses less digits than its factorization.

20452359081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8048973 (or 8048962 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The spelling of 20452359081 in words is "twenty billion, four hundred fifty-two million, three hundred fifty-nine thousand, eighty-one".