20506803830 has 8 divisors (see below), whose sum is σ = 36912246912. Its totient is φ = 8202721528.

The previous prime is 20506803781. The next prime is 20506803859. The reversal of 20506803830 is 3830860502.

20506803830 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-3 number, since 3×20506803830³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1025340182 + ... + 1025340201.

It is an arithmetic number, because the mean of its divisors is an integer number (4614030864).

Almost surely, 2^20506803830 is an apocalyptic number.

20506803830 is a deficient number, since it is larger than the sum of its proper divisors (16405443082).

20506803830 is a wasteful number, since it uses less digits than its factorization.

20506803830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2050680390.

The product of its (nonzero) digits is 34560, while the sum is 35.

The spelling of 20506803830 in words is "twenty billion, five hundred six million, eight hundred three thousand, eight hundred thirty".