20485811073 has 144 divisors (see below), whose sum is σ = 35718414336. Its totient is φ = 10401955200.

The previous prime is 20485811069. The next prime is 20485811081. The reversal of 20485811073 is 37011858402.

It is not a de Polignac number, because 20485811073 - 2² = 20485811069 is a prime.

It is a super-2 number, since 2×20485811073² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20485811573) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 135667548 + ... + 135667698.

It is an arithmetic number, because the mean of its divisors is an integer number (248044544).

Almost surely, 2^20485811073 is an apocalyptic number.

It is an amenable number.

20485811073 is a deficient number, since it is larger than the sum of its proper divisors (15232603263).

20485811073 is a wasteful number, since it uses less digits than its factorization.

20485811073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364 (or 344 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 39.

The spelling of 20485811073 in words is "twenty billion, four hundred eighty-five million, eight hundred eleven thousand, seventy-three".