30020992 has 16 divisors (see below), whose sum is σ = 59807700. Its totient is φ = 15010432.

The previous prime is 30020987. The next prime is 30020999. The reversal of 30020992 is 29902003.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30020999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117142 + ... + 117397.

Almost surely, 2^30020992 is an apocalyptic number.

30020992 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

30020992 is a deficient number, since it is larger than the sum of its proper divisors (29786708).

30020992 is an equidigital number, since it uses as much as digits as its factorization.

30020992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234553 (or 234541 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 25.

The square root of 30020992 is about 5479.1415385989. The cubic root of 30020992 is about 310.7957081696.

Adding to 30020992 its reverse (29902003), we get a palindrome (59922995).

The spelling of 30020992 in words is "thirty million, twenty thousand, nine hundred ninety-two".