20394697830 has 32 divisors (see below), whose sum is σ = 52712450784. Its totient is φ = 5020233216.

The previous prime is 20394697783. The next prime is 20394697861. The reversal of 20394697830 is 3879649302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26146659 + ... + 26147438.

It is an arithmetic number, because the mean of its divisors is an integer number (1647264087).

Almost surely, 2^20394697830 is an apocalyptic number.

20394697830 is an abundant number, since it is smaller than the sum of its proper divisors (32317752954).

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

20394697830 is a wasteful number, since it uses less digits than its factorization.

20394697830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52294120.

The product of its (nonzero) digits is 1959552, while the sum is 51.

The spelling of 20394697830 in words is "twenty billion, three hundred ninety-four million, six hundred ninety-seven thousand, eight hundred thirty".