20126451356646 has 8 divisors (see below), whose sum is σ = 40252902713304. Its totient is φ = 6708817118880.

The previous prime is 20126451356623. The next prime is 20126451356663. The reversal of 20126451356646 is 64665315462102.

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

20126451356646 is an admirable number.

It is a super-2 number, since 2×20126451356646² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

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, 1677204279715 + ... + 1677204279726.

It is an arithmetic number, because the mean of its divisors is an integer number (5031612839163).

Almost surely, 2^{20126451356646} is an apocalyptic number.

20126451356646 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20126451356646 is a wasteful number, since it uses less digits than its factorization.

20126451356646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3354408559446.

The product of its (nonzero) digits is 6220800, while the sum is 51.

The spelling of 20126451356646 in words is "twenty trillion, one hundred twenty-six billion, four hundred fifty-one million, three hundred fifty-six thousand, six hundred forty-six".