30205749972 has 24 divisors (see below), whose sum is σ = 70740164992. Its totient is φ = 10031428800.

The previous prime is 30205749967. The next prime is 30205749979. The reversal of 30205749972 is 27994750203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30205749979) 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, 4640929 + ... + 4647432.

Almost surely, 2^30205749972 is an apocalyptic number.

It is an amenable number.

30205749972 is an abundant number, since it is smaller than the sum of its proper divisors (40534415020).

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

30205749972 is a wasteful number, since it uses less digits than its factorization.

30205749972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9288639 (or 9288637 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 48.

The spelling of 30205749972 in words is "thirty billion, two hundred five million, seven hundred forty-nine thousand, nine hundred seventy-two".