20745381774 has 32 divisors (see below), whose sum is σ = 44722127520. Its totient is φ = 6377513472.

The previous prime is 20745381763. The next prime is 20745381793. The reversal of 20745381774 is 47718354702.

It is a super-2 number, since 2×20745381774² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29727 + ... + 205850.

It is an arithmetic number, because the mean of its divisors is an integer number (1397566485).

Almost surely, 2^20745381774 is an apocalyptic number.

20745381774 is an abundant number, since it is smaller than the sum of its proper divisors (23976745746).

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

20745381774 is a wasteful number, since it uses less digits than its factorization.

20745381774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236724.

The product of its (nonzero) digits is 1317120, while the sum is 48.

The spelling of 20745381774 in words is "twenty billion, seven hundred forty-five million, three hundred eighty-one thousand, seven hundred seventy-four".