20400205934 has 8 divisors (see below), whose sum is σ = 30600915048. Its totient is φ = 10199900920.

The previous prime is 20400205927. The next prime is 20400205963. The reversal of 20400205934 is 43950200402.

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

It is a junction number, because it is equal to n+sod(n) for n = 20400205897 and 20400205906.

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, 145544 + ... + 248964.

It is an arithmetic number, because the mean of its divisors is an integer number (3825114381).

Almost surely, 2^20400205934 is an apocalyptic number.

20400205934 is a deficient number, since it is larger than the sum of its proper divisors (10200709114).

20400205934 is a wasteful number, since it uses less digits than its factorization.

20400205934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202050.

The product of its (nonzero) digits is 8640, while the sum is 29.

The spelling of 20400205934 in words is "twenty billion, four hundred million, two hundred five thousand, nine hundred thirty-four".