20146253523 has 24 divisors (see below), whose sum is σ = 30082755024. Its totient is φ = 11979464640.

The previous prime is 20146253521. The next prime is 20146253551. The reversal of 20146253523 is 32535264102.

It is a happy number.

It is not a de Polignac number, because 20146253523 - 2¹ = 20146253521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (20146253521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 504340 + ... + 542817.

It is an arithmetic number, because the mean of its divisors is an integer number (1253448126).

Almost surely, 2^20146253523 is an apocalyptic number.

20146253523 is a deficient number, since it is larger than the sum of its proper divisors (9936501501).

20146253523 is a wasteful number, since it uses less digits than its factorization.

20146253523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047235 (or 1047224 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 33.

The spelling of 20146253523 in words is "twenty billion, one hundred forty-six million, two hundred fifty-three thousand, five hundred twenty-three".