30052780021 has 16 divisors (see below), whose sum is σ = 33490050048. Its totient is φ = 26739199600.

The previous prime is 30052780019. The next prime is 30052780039. The reversal of 30052780021 is 12008725003.

It is a cyclic number.

It is not a de Polignac number, because 30052780021 - 2¹ = 30052780019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30052780061) 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, 56125 + ... + 251506.

It is an arithmetic number, because the mean of its divisors is an integer number (2093128128).

Almost surely, 2^30052780021 is an apocalyptic number.

It is an amenable number.

30052780021 is a deficient number, since it is larger than the sum of its proper divisors (3437270027).

30052780021 is a wasteful number, since it uses less digits than its factorization.

30052780021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307832.

The product of its (nonzero) digits is 3360, while the sum is 28.

The spelling of 30052780021 in words is "thirty billion, fifty-two million, seven hundred eighty thousand, twenty-one".