20612451245 has 16 divisors (see below), whose sum is σ = 26121627840. Its totient is φ = 15571160064.

The previous prime is 20612451203. The next prime is 20612451247. The reversal of 20612451245 is 54215421602.

It is a cyclic number.

It is not a de Polignac number, because 20612451245 - 2²⁸ = 20344015789 is a prime.

It is a super-3 number, since 3×20612451245³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20612451247) 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 15 ways as a sum of consecutive naturals, for example, 324212 + ... + 382541.

It is an arithmetic number, because the mean of its divisors is an integer number (1632601740).

Almost surely, 2^20612451245 is an apocalyptic number.

It is an amenable number.

20612451245 is a deficient number, since it is larger than the sum of its proper divisors (5509176595).

20612451245 is a wasteful number, since it uses less digits than its factorization.

20612451245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707084.

The product of its (nonzero) digits is 19200, while the sum is 32.

Adding to 20612451245 its reverse (54215421602), we get a palindrome (74827872847).

The spelling of 20612451245 in words is "twenty billion, six hundred twelve million, four hundred fifty-one thousand, two hundred forty-five".