30478138621 has 16 divisors (see below), whose sum is σ = 37413712000. Its totient is φ = 24749159904.

The previous prime is 30478138601. The next prime is 30478138631. The reversal of 30478138621 is 12683187403.

It is not a de Polignac number, because 30478138621 - 2¹³ = 30478130429 is a prime.

It is a super-3 number, since 3×30478138621³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30478138601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2331840 + ... + 2344873.

It is an arithmetic number, because the mean of its divisors is an integer number (2338357000).

Almost surely, 2^30478138621 is an apocalyptic number.

It is an amenable number.

30478138621 is a deficient number, since it is larger than the sum of its proper divisors (6935573379).

30478138621 is an equidigital number, since it uses as much as digits as its factorization.

30478138621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4676753 (or 4676739 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 43.

The spelling of 30478138621 in words is "thirty billion, four hundred seventy-eight million, one hundred thirty-eight thousand, six hundred twenty-one".