1021618396 has 12 divisors (see below), whose sum is σ = 1836152248. Its totient is φ = 497003472.

The previous prime is 1021618337. The next prime is 1021618399. The reversal of 1021618396 is 6938161201.

It is a super-2 number, since 2×1021618396² = 2087408294091225632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021618399) 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, 3451266 + ... + 3451561.

Almost surely, 2^1021618396 is an apocalyptic number.

It is an amenable number.

1021618396 is a deficient number, since it is larger than the sum of its proper divisors (814533852).

1021618396 is a wasteful number, since it uses less digits than its factorization.

1021618396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6902868 (or 6902866 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 1021618396 is about 31962.7657751954. The cubic root of 1021618396 is about 1007.1548184840.

Adding to 1021618396 its reverse (6938161201), we get a palindrome (7959779597).

The spelling of 1021618396 in words is "one billion, twenty-one million, six hundred eighteen thousand, three hundred ninety-six".