20010243278 has 16 divisors (see below), whose sum is σ = 31863974400. Its totient is φ = 9391992576.

The previous prime is 20010243277. The next prime is 20010243293. The reversal of 20010243278 is 87234201002.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 20010243278.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010243277) 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, 755303 + ... + 781346.

It is an arithmetic number, because the mean of its divisors is an integer number (1991498400).

Almost surely, 2^20010243278 is an apocalyptic number.

20010243278 is a deficient number, since it is larger than the sum of its proper divisors (11853731122).

20010243278 is a wasteful number, since it uses less digits than its factorization.

20010243278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1537051.

The product of its (nonzero) digits is 5376, while the sum is 29.

The spelling of 20010243278 in words is "twenty billion, ten million, two hundred forty-three thousand, two hundred seventy-eight".