20651237145 has 192 divisors, whose sum is σ = 46947962880. Its totient is φ = 8458732800.

The previous prime is 20651237141. The next prime is 20651237153. The reversal of 20651237145 is 54173215602.

It is not a de Polignac number, because 20651237145 - 2² = 20651237141 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20651237141) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 6640851 + ... + 6643959.

It is an arithmetic number, because the mean of its divisors is an integer number (244520640).

Almost surely, 2^20651237145 is an apocalyptic number.

It is an amenable number.

20651237145 is an abundant number, since it is smaller than the sum of its proper divisors (26296725735).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20651237145 is a wasteful number, since it uses less digits than its factorization.

20651237145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3218 (or 3206 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The spelling of 20651237145 in words is "twenty billion, six hundred fifty-one million, two hundred thirty-seven thousand, one hundred forty-five".