20543512242 has 32 divisors (see below), whose sum is σ = 45284307264. Its totient is φ = 6161126400.

The previous prime is 20543512219. The next prime is 20543512247. The reversal of 20543512242 is 24221534502.

It is not an unprimeable number, because it can be changed into a prime (20543512247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1598059 + ... + 1610862.

It is an arithmetic number, because the mean of its divisors is an integer number (1415134602).

Almost surely, 2^20543512242 is an apocalyptic number.

20543512242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20543512242 is an abundant number, since it is smaller than the sum of its proper divisors (24740795022).

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

20543512242 is a wasteful number, since it uses less digits than its factorization.

20543512242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3209034.

The product of its (nonzero) digits is 19200, while the sum is 30.

The spelling of 20543512242 in words is "twenty billion, five hundred forty-three million, five hundred twelve thousand, two hundred forty-two".