920820534 has 16 divisors (see below), whose sum is σ = 1843227840. Its totient is φ = 306675720.

The previous prime is 920820491. The next prime is 920820547. The reversal of 920820534 is 435028029.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 920820495 and 920820504.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58504 + ... + 72555.

It is an arithmetic number, because the mean of its divisors is an integer number (115201740).

Almost surely, 2^920820534 is an apocalyptic number.

920820534 is an abundant number, since it is smaller than the sum of its proper divisors (922407306).

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

920820534 is a wasteful number, since it uses less digits than its factorization.

920820534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132235.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 920820534 is about 30345.0248640531. The cubic root of 920820534 is about 972.8778860245.

The spelling of 920820534 in words is "nine hundred twenty million, eight hundred twenty thousand, five hundred thirty-four".