61820030 has 16 divisors (see below), whose sum is σ = 111573504. Its totient is φ = 24661920.

The previous prime is 61819997. The next prime is 61820039. The reversal of 61820030 is 3002816.

It is a super-2 number, since 2×61820030² = 7643432218401800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61819984 and 61820011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61820039) by changing a digit.

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, 4241 + ... + 11900.

It is an arithmetic number, because the mean of its divisors is an integer number (6973344).

Almost surely, 2^61820030 is an apocalyptic number.

61820030 is a deficient number, since it is larger than the sum of its proper divisors (49753474).

61820030 is a wasteful number, since it uses less digits than its factorization.

61820030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16531.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 61820030 is about 7862.5714623143. The cubic root of 61820030 is about 395.4058318949.

Adding to 61820030 its reverse (3002816), we get a palindrome (64822846).

The spelling of 61820030 in words is "sixty-one million, eight hundred twenty thousand, thirty".