20645251500433 has 32 divisors (see below), whose sum is σ = 25030020280320. Its totient is φ = 16623324990720.

The previous prime is 20645251500413. The next prime is 20645251500473. The reversal of 20645251500433 is 33400515254602.

It is not a de Polignac number, because 20645251500433 - 2⁴¹ = 18446228244881 is a prime.

It is a super-2 number, since 2×20645251500433² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20645251500413) 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, 209413210 + ... + 209511772.

It is an arithmetic number, because the mean of its divisors is an integer number (782188133760).

Almost surely, 2^{20645251500433} is an apocalyptic number.

It is an amenable number.

20645251500433 is a deficient number, since it is larger than the sum of its proper divisors (4384768779887).

20645251500433 is a wasteful number, since it uses less digits than its factorization.

20645251500433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101917.

The product of its (nonzero) digits is 432000, while the sum is 40.

The spelling of 20645251500433 in words is "twenty trillion, six hundred forty-five billion, two hundred fifty-one million, five hundred thousand, four hundred thirty-three".