1820914632 has 48 divisors (see below), whose sum is σ = 5051935980. Its totient is φ = 592166400.

The previous prime is 1820914621. The next prime is 1820914639. The reversal of 1820914632 is 2364190281.

1820914632 is a `hidden beast` number, since 1 + 8 + 2 + 0 + 9 + 14 + 632 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1820387556 + 527076 = 42666^2 + 726^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1820914639) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 305469 + ... + 311372.

Almost surely, 2^1820914632 is an apocalyptic number.

1820914632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1820914632 is an abundant number, since it is smaller than the sum of its proper divisors (3231021348).

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

1820914632 is a wasteful number, since it uses less digits than its factorization.

1820914632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616894 (or 616887 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 1820914632 is about 42672.1763213455. The cubic root of 1820914632 is about 1221.1336394644.

The spelling of 1820914632 in words is "one billion, eight hundred twenty million, nine hundred fourteen thousand, six hundred thirty-two".