20510221146 has 8 divisors (see below), whose sum is σ = 41020442304. Its totient is φ = 6836740380.

The previous prime is 20510221111. The next prime is 20510221169. The reversal of 20510221146 is 64112201502.

It is a sphenic number, since it is the product of 3 distinct primes.

20510221146 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1709185090 + ... + 1709185101.

It is an arithmetic number, because the mean of its divisors is an integer number (5127555288).

Almost surely, 2^20510221146 is an apocalyptic number.

20510221146 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20510221146 is a wasteful number, since it uses less digits than its factorization.

20510221146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3418370196.

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 20510221146 its reverse (64112201502), we get a palindrome (84622422648).

The spelling of 20510221146 in words is "twenty billion, five hundred ten million, two hundred twenty-one thousand, one hundred forty-six".