20861434396 has 24 divisors (see below), whose sum is σ = 39866972544. Its totient is φ = 9472804080.

The previous prime is 20861434367. The next prime is 20861434397. The reversal of 20861434396 is 69343416802.

It is a super-2 number, since 2×20861434396² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20861434397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 197910 + ... + 284413.

It is an arithmetic number, because the mean of its divisors is an integer number (1661123856).

Almost surely, 2^20861434396 is an apocalyptic number.

It is an amenable number.

20861434396 is a deficient number, since it is larger than the sum of its proper divisors (19005538148).

20861434396 is a wasteful number, since it uses less digits than its factorization.

20861434396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 483321 (or 483319 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 46.

The spelling of 20861434396 in words is "twenty billion, eight hundred sixty-one million, four hundred thirty-four thousand, three hundred ninety-six".