820330732453 has 4 divisors (see below), whose sum is σ = 820371623968. Its totient is φ = 820289840940.

The previous prime is 820330732451. The next prime is 820330732493. The reversal of 820330732453 is 354237033028.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 820330732453 - 2¹ = 820330732451 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820330732451) 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, 20415651 + ... + 20455792.

It is an arithmetic number, because the mean of its divisors is an integer number (205092905992).

Almost surely, 2^820330732453 is an apocalyptic number.

It is an amenable number.

820330732453 is a deficient number, since it is larger than the sum of its proper divisors (40891515).

820330732453 is a wasteful number, since it uses less digits than its factorization.

820330732453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40891514.

The product of its (nonzero) digits is 362880, while the sum is 40.

The spelling of 820330732453 in words is "eight hundred twenty billion, three hundred thirty million, seven hundred thirty-two thousand, four hundred fifty-three".