1020930851 has 4 divisors (see below), whose sum is σ = 1042652832. Its totient is φ = 999208872.

The previous prime is 1020930847. The next prime is 1020930881. The reversal of 1020930851 is 1580390201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1020930851 - 2² = 1020930847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020930881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10860920 + ... + 10861013.

It is an arithmetic number, because the mean of its divisors is an integer number (260663208).

Almost surely, 2^1020930851 is an apocalyptic number.

1020930851 is a deficient number, since it is larger than the sum of its proper divisors (21721981).

1020930851 is an equidigital number, since it uses as much as digits as its factorization.

1020930851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21721980.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 1020930851 is about 31952.0085597134. The cubic root of 1020930851 is about 1006.9288307563.

The spelling of 1020930851 in words is "one billion, twenty million, nine hundred thirty thousand, eight hundred fifty-one".