1821922364 has 6 divisors (see below), whose sum is σ = 3188364144. Its totient is φ = 910961180.

The previous prime is 1821922363. The next prime is 1821922373. The reversal of 1821922364 is 4632291281.

It is a super-2 number, since 2×1821922364² = 6638802200886696992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1821922363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 227740292 + ... + 227740299.

It is an arithmetic number, because the mean of its divisors is an integer number (531394024).

Almost surely, 2^1821922364 is an apocalyptic number.

It is an amenable number.

1821922364 is a deficient number, since it is larger than the sum of its proper divisors (1366441780).

1821922364 is a wasteful number, since it uses less digits than its factorization.

1821922364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455480595 (or 455480593 counting only the distinct ones).

The product of its digits is 41472, while the sum is 38.

The square root of 1821922364 is about 42683.9825227216. The cubic root of 1821922364 is about 1221.3588648327.

The spelling of 1821922364 in words is "one billion, eight hundred twenty-one million, nine hundred twenty-two thousand, three hundred sixty-four".