20740426390 has 64 divisors (see below), whose sum is σ = 38708772480. Its totient is φ = 7997322240.

The previous prime is 20740426363. The next prime is 20740426417. The reversal of 20740426390 is 9362404702.

20740426390 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (20740426363) and next prime (20740426417).

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 31 ways as a sum of consecutive naturals, for example, 7435116 + ... + 7437904.

It is an arithmetic number, because the mean of its divisors is an integer number (604824570).

Almost surely, 2^20740426390 is an apocalyptic number.

20740426390 is a deficient number, since it is larger than the sum of its proper divisors (17968346090).

20740426390 is a wasteful number, since it uses less digits than its factorization.

20740426390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3097.

The product of its (nonzero) digits is 72576, while the sum is 37.

The spelling of 20740426390 in words is "twenty billion, seven hundred forty million, four hundred twenty-six thousand, three hundred ninety".