1020638195 has 8 divisors (see below), whose sum is σ = 1224955536. Its totient is φ = 816384096.

The previous prime is 1020638183. The next prime is 1020638221. The reversal of 1020638195 is 5918360201.

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

It is a cyclic number.

It is not a de Polignac number, because 1020638195 - 2¹⁶ = 1020572659 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33929 + ... + 56501.

It is an arithmetic number, because the mean of its divisors is an integer number (153119442).

Almost surely, 2^1020638195 is an apocalyptic number.

1020638195 is a deficient number, since it is larger than the sum of its proper divisors (204317341).

1020638195 is an equidigital number, since it uses as much as digits as its factorization.

1020638195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31621.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 1020638195 is about 31947.4286132703. The cubic root of 1020638195 is about 1006.8326074826.

Adding to 1020638195 its reverse (5918360201), we get a palindrome (6938998396).

The spelling of 1020638195 in words is "one billion, twenty million, six hundred thirty-eight thousand, one hundred ninety-five".