20551411250542 has 4 divisors (see below), whose sum is σ = 30827116875816. Its totient is φ = 10275705625270.

The previous prime is 20551411250479. The next prime is 20551411250549. The reversal of 20551411250542 is 24505211415502.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20551411250549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5137852812634 + ... + 5137852812637.

It is an arithmetic number, because the mean of its divisors is an integer number (7706779218954).

Almost surely, 2^{20551411250542} is an apocalyptic number.

20551411250542 is a deficient number, since it is larger than the sum of its proper divisors (10275705625274).

20551411250542 is a wasteful number, since it uses less digits than its factorization.

20551411250542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10275705625273.

The product of its (nonzero) digits is 80000, while the sum is 37.

The spelling of 20551411250542 in words is "twenty trillion, five hundred fifty-one billion, four hundred eleven million, two hundred fifty thousand, five hundred forty-two".