30996990381 has 8 divisors (see below), whose sum is σ = 47233509184. Its totient is φ = 17712565920.

The previous prime is 30996990379. The next prime is 30996990383. The reversal of 30996990381 is 18309969903.

It is an interprime number because it is at equal distance from previous prime (30996990379) and next prime (30996990383).

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

It is not a de Polignac number, because 30996990381 - 2¹ = 30996990379 is a prime.

It is a super-2 number, since 2×30996990381² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30996990383) 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, 738023560 + ... + 738023601.

It is an arithmetic number, because the mean of its divisors is an integer number (5904188648).

Almost surely, 2^30996990381 is an apocalyptic number.

It is an amenable number.

30996990381 is a deficient number, since it is larger than the sum of its proper divisors (16236518803).

30996990381 is a wasteful number, since it uses less digits than its factorization.

30996990381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1476047171.

The product of its (nonzero) digits is 2834352, while the sum is 57.

The spelling of 30996990381 in words is "thirty billion, nine hundred ninety-six million, nine hundred ninety thousand, three hundred eighty-one".