30420681 has 8 divisors (see below), whose sum is σ = 41959680. Its totient is φ = 19581072.

The previous prime is 30420679. The next prime is 30420683. The reversal of 30420681 is 18602403.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (30420679) and next prime (30420683).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30420681 - 2¹ = 30420679 is a prime.

It is a super-2 number, since 2×30420681² = 1850835665007522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30420683) 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, 174745 + ... + 174918.

It is an arithmetic number, because the mean of its divisors is an integer number (5244960).

Almost surely, 2^30420681 is an apocalyptic number.

It is an amenable number.

30420681 is a deficient number, since it is larger than the sum of its proper divisors (11538999).

30420681 is a wasteful number, since it uses less digits than its factorization.

30420681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349695.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 30420681 is about 5515.4946287708. The cubic root of 30420681 is about 312.1689071453.

The spelling of 30420681 in words is "thirty million, four hundred twenty thousand, six hundred eighty-one".