20445230651145 has 32 divisors (see below), whose sum is σ = 33013086205440. Its totient is φ = 10803887619840.

The previous prime is 20445230651141. The next prime is 20445230651179. The reversal of 20445230651145 is 54115603254402.

It is not a de Polignac number, because 20445230651145 - 2² = 20445230651141 is a prime.

It is a super-2 number, since 2×20445230651145² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20445230651097 and 20445230651106.

It is not an unprimeable number, because it can be changed into a prime (20445230651141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 147916407 + ... + 148054563.

It is an arithmetic number, because the mean of its divisors is an integer number (1031658943920).

Almost surely, 2^{20445230651145} is an apocalyptic number.

It is an amenable number.

20445230651145 is a deficient number, since it is larger than the sum of its proper divisors (12567855554295).

20445230651145 is a wasteful number, since it uses less digits than its factorization.

20445230651145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228785.

The product of its (nonzero) digits is 576000, while the sum is 42.

The spelling of 20445230651145 in words is "twenty trillion, four hundred forty-five billion, two hundred thirty million, six hundred fifty-one thousand, one hundred forty-five".