1021664332 has 12 divisors (see below), whose sum is σ = 1925444416. Its totient is φ = 471537360.

The previous prime is 1021664323. The next prime is 1021664341. The reversal of 1021664332 is 2334661201.

It is an interprime number because it is at equal distance from previous prime (1021664323) and next prime (1021664341).

It is a self number, because there is not a number n which added to its sum of digits gives 1021664332.

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, 9823644 + ... + 9823747.

Almost surely, 2^1021664332 is an apocalyptic number.

It is an amenable number.

1021664332 is a deficient number, since it is larger than the sum of its proper divisors (903780084).

1021664332 is a wasteful number, since it uses less digits than its factorization.

1021664332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19647408 (or 19647406 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 1021664332 is about 31963.4843532428. The cubic root of 1021664332 is about 1007.1699134779.

The spelling of 1021664332 in words is "one billion, twenty-one million, six hundred sixty-four thousand, three hundred thirty-two".