20405134295694 has 48 divisors (see below), whose sum is σ = 45862728649920. Its totient is φ = 6551818341120.

The previous prime is 20405134295683. The next prime is 20405134295729. The reversal of 20405134295694 is 49659243150402.

20405134295694 is a `hidden beast` number, since 2 + 0 + 4 + 0 + 51 + 3 + 4 + 29 + 569 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 20405134295694.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 174936847 + ... + 175053450.

It is an arithmetic number, because the mean of its divisors is an integer number (955473513540).

Almost surely, 2^{20405134295694} is an apocalyptic number.

20405134295694 is an abundant number, since it is smaller than the sum of its proper divisors (25457594354226).

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

20405134295694 is a wasteful number, since it uses less digits than its factorization.

20405134295694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349990425 (or 349990422 counting only the distinct ones).

The product of its (nonzero) digits is 9331200, while the sum is 54.

The spelling of 20405134295694 in words is "twenty trillion, four hundred five billion, one hundred thirty-four million, two hundred ninety-five thousand, six hundred ninety-four".