20830939778 has 64 divisors (see below), whose sum is σ = 35208069120. Its totient is φ = 9163627200.

The previous prime is 20830939777. The next prime is 20830939793. The reversal of 20830939778 is 87793903802.

It is not an unprimeable number, because it can be changed into a prime (20830939777) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27517376 + ... + 27518132.

It is an arithmetic number, because the mean of its divisors is an integer number (550126080).

Almost surely, 2^20830939778 is an apocalyptic number.

20830939778 is a deficient number, since it is larger than the sum of its proper divisors (14377129342).

20830939778 is a wasteful number, since it uses less digits than its factorization.

20830939778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143.

The product of its (nonzero) digits is 4572288, while the sum is 56.

The spelling of 20830939778 in words is "twenty billion, eight hundred thirty million, nine hundred thirty-nine thousand, seven hundred seventy-eight".