20116761651421 has 8 divisors (see below), whose sum is σ = 20163450401024. Its totient is φ = 20070073961280.

The previous prime is 20116761651419. The next prime is 20116761651449. The reversal of 20116761651421 is 12415616761102.

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

It is a cyclic number.

It is not a de Polignac number, because 20116761651421 - 2¹ = 20116761651419 is a prime.

It is a super-2 number, since 2×20116761651421² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20116561651421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47893300 + ... + 48311506.

It is an arithmetic number, because the mean of its divisors is an integer number (2520431300128).

Almost surely, 2^{20116761651421} is an apocalyptic number.

It is an amenable number.

20116761651421 is a deficient number, since it is larger than the sum of its proper divisors (46688749603).

20116761651421 is a wasteful number, since it uses less digits than its factorization.

20116761651421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529731.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 20116761651421 in words is "twenty trillion, one hundred sixteen billion, seven hundred sixty-one million, six hundred fifty-one thousand, four hundred twenty-one".