30122137840 has 40 divisors (see below), whose sum is σ = 70045405200. Its totient is φ = 12046887936.

The previous prime is 30122137823. The next prime is 30122137847. The reversal of 30122137840 is 4873122103.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30122137847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 524632 + ... + 579208.

It is an arithmetic number, because the mean of its divisors is an integer number (1751135130).

Almost surely, 2^30122137840 is an apocalyptic number.

It is an amenable number.

30122137840 is an abundant number, since it is smaller than the sum of its proper divisors (39923267360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30122137840 is a wasteful number, since it uses less digits than its factorization.

30122137840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61489 (or 61483 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

Adding to 30122137840 its reverse (4873122103), we get a palindrome (34995259943).

The spelling of 30122137840 in words is "thirty billion, one hundred twenty-two million, one hundred thirty-seven thousand, eight hundred forty".