20711678801421 has 32 divisors (see below), whose sum is σ = 27924955545600. Its totient is φ = 13653968227200.

The previous prime is 20711678801413. The next prime is 20711678801423. The reversal of 20711678801421 is 12410887611702.

It is not a de Polignac number, because 20711678801421 - 2³ = 20711678801413 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20711678801423) 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, 309285340 + ... + 309352298.

It is an arithmetic number, because the mean of its divisors is an integer number (872654860800).

Almost surely, 2^{20711678801421} is an apocalyptic number.

It is an amenable number.

20711678801421 is a deficient number, since it is larger than the sum of its proper divisors (7213276744179).

20711678801421 is a wasteful number, since it uses less digits than its factorization.

20711678801421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70209.

The product of its (nonzero) digits is 301056, while the sum is 48.

The spelling of 20711678801421 in words is "twenty trillion, seven hundred eleven billion, six hundred seventy-eight million, eight hundred one thousand, four hundred twenty-one".