20351666465416 has 64 divisors (see below), whose sum is σ = 44832440076480. Its totient is φ = 8538809114880.

The previous prime is 20351666465407. The next prime is 20351666465423. The reversal of 20351666465416 is 61456466615302.

It is a super-3 number, since 3×20351666465416³ (a number of 41 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28414450 + ... + 29121886.

It is an arithmetic number, because the mean of its divisors is an integer number (700506876195).

Almost surely, 2^{20351666465416} is an apocalyptic number.

20351666465416 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

20351666465416 is an abundant number, since it is smaller than the sum of its proper divisors (24480773611064).

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

20351666465416 is a wasteful number, since it uses less digits than its factorization.

20351666465416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732614 (or 732610 counting only the distinct ones).

The product of its (nonzero) digits is 18662400, while the sum is 55.

The spelling of 20351666465416 in words is "twenty trillion, three hundred fifty-one billion, six hundred sixty-six million, four hundred sixty-five thousand, four hundred sixteen".