20194511247 has 32 divisors (see below), whose sum is σ = 31539475200. Its totient is φ = 12735369504.

The previous prime is 20194511231. The next prime is 20194511347. The reversal of 20194511247 is 74211549102.

It is not a de Polignac number, because 20194511247 - 2⁴ = 20194511231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20194511347) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 318228 + ... + 376374.

It is an arithmetic number, because the mean of its divisors is an integer number (985608600).

Almost surely, 2^20194511247 is an apocalyptic number.

20194511247 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

20194511247 is a deficient number, since it is larger than the sum of its proper divisors (11344963953).

20194511247 is a wasteful number, since it uses less digits than its factorization.

20194511247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58852 (or 58846 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

It can be divided in two parts, 20194 and 511247, that added together give a 12-th power (531441 = 3¹²).

The spelling of 20194511247 in words is "twenty billion, one hundred ninety-four million, five hundred eleven thousand, two hundred forty-seven".