20261887446 has 32 divisors (see below), whose sum is σ = 42495435360. Its totient is φ = 6431733504.

The previous prime is 20261887433. The next prime is 20261887469. The reversal of 20261887446 is 64478816202.

It is a junction number, because it is equal to n+sod(n) for n = 20261887395 and 20261887404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 784885 + ... + 810288.

It is an arithmetic number, because the mean of its divisors is an integer number (1327982355).

Almost surely, 2^20261887446 is an apocalyptic number.

20261887446 is an abundant number, since it is smaller than the sum of its proper divisors (22233547914).

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

20261887446 is a wasteful number, since it uses less digits than its factorization.

20261887446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1595280.

The product of its (nonzero) digits is 1032192, while the sum is 48.

The spelling of 20261887446 in words is "twenty billion, two hundred sixty-one million, eight hundred eighty-seven thousand, four hundred forty-six".