61803820 has 24 divisors (see below), whose sum is σ = 139772304. Its totient is φ = 22819776.

The previous prime is 61803817. The next prime is 61803821. The reversal of 61803820 is 2830816.

It is not an unprimeable number, because it can be changed into a prime (61803821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118594 + ... + 119113.

It is an arithmetic number, because the mean of its divisors is an integer number (5823846).

Almost surely, 2^61803820 is an apocalyptic number.

It is an amenable number.

61803820 is an abundant number, since it is smaller than the sum of its proper divisors (77968484).

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

61803820 is a wasteful number, since it uses less digits than its factorization.

61803820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237729 (or 237727 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 61803820 is about 7861.5405614930. The cubic root of 61803820 is about 395.3712687238.

It can be divided in two parts, 6180 and 3820, that added together give a 4-th power (10000 = 10⁴).

The spelling of 61803820 in words is "sixty-one million, eight hundred three thousand, eight hundred twenty".