1021604022 has 16 divisors (see below), whose sum is σ = 2270231280. Its totient is φ = 340534656.

The previous prime is 1021604021. The next prime is 1021604029. The reversal of 1021604022 is 2204061201.

1021604022 is a `hidden beast` number, since 102 + 160 + 402 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1021603986 and 1021604004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021604021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9459243 + ... + 9459350.

It is an arithmetic number, because the mean of its divisors is an integer number (141889455).

Almost surely, 2^1021604022 is an apocalyptic number.

1021604022 is an abundant number, since it is smaller than the sum of its proper divisors (1248627258).

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

1021604022 is a wasteful number, since it uses less digits than its factorization.

1021604022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18918604 (or 18918598 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1021604022 is about 31962.5409190196. The cubic root of 1021604022 is about 1007.1500949619.

Adding to 1021604022 its reverse (2204061201), we get a palindrome (3225665223).

The spelling of 1021604022 in words is "one billion, twenty-one million, six hundred four thousand, twenty-two".