30903937642 has 4 divisors (see below), whose sum is σ = 46355906466. Its totient is φ = 15451968820.

The previous prime is 30903937637. The next prime is 30903937643. The reversal of 30903937642 is 24673930903.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24673930903 = 3001 ⋅8221903.

It can be written as a sum of positive squares in only one way, i.e., 30719222361 + 184715281 = 175269^2 + 13591^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30903937592 and 30903937601.

It is not an unprimeable number, because it can be changed into a prime (30903937643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7725984409 + ... + 7725984412.

Almost surely, 2^30903937642 is an apocalyptic number.

30903937642 is a deficient number, since it is larger than the sum of its proper divisors (15451968824).

30903937642 is a wasteful number, since it uses less digits than its factorization.

30903937642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15451968823.

The product of its (nonzero) digits is 734832, while the sum is 46.

The spelling of 30903937642 in words is "thirty billion, nine hundred three million, nine hundred thirty-seven thousand, six hundred forty-two".