20146256562 has 16 divisors (see below), whose sum is σ = 40322892672. Its totient is φ = 6710355600.

The previous prime is 20146256539. The next prime is 20146256573. The reversal of 20146256562 is 26565264102.

It is a self number, because there is not a number n which added to its sum of digits gives 20146256562.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1257189 + ... + 1273112.

It is an arithmetic number, because the mean of its divisors is an integer number (2520180792).

Almost surely, 2^20146256562 is an apocalyptic number.

20146256562 is an abundant number, since it is smaller than the sum of its proper divisors (20176636110).

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

20146256562 is a wasteful number, since it uses less digits than its factorization.

20146256562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2531633.

The product of its (nonzero) digits is 172800, while the sum is 39.

The spelling of 20146256562 in words is "twenty billion, one hundred forty-six million, two hundred fifty-six thousand, five hundred sixty-two".