20066451740 has 24 divisors (see below), whose sum is σ = 42556776192. Its totient is φ = 7947108800.

The previous prime is 20066451673. The next prime is 20066451749. The reversal of 20066451740 is 4715466002.

It is a super-3 number, since 3×20066451740³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20066451740.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20066451749) 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, 4964924 + ... + 4968963.

It is an arithmetic number, because the mean of its divisors is an integer number (1773199008).

Almost surely, 2^20066451740 is an apocalyptic number.

20066451740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20066451740 is an abundant number, since it is smaller than the sum of its proper divisors (22490324452).

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

20066451740 is a wasteful number, since it uses less digits than its factorization.

20066451740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9933997 (or 9933995 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The spelling of 20066451740 in words is "twenty billion, sixty-six million, four hundred fifty-one thousand, seven hundred forty".