20155442051450 has 36 divisors (see below), whose sum is σ = 39566081930670. Its totient is φ = 7637851717920.

The previous prime is 20155442051449. The next prime is 20155442051473. The reversal of 20155442051450 is 5415024455102.

It can be written as a sum of positive squares in 3 ways, for example, as 18306666119641 + 1848775931809 = 4278629^2 + 1359697^2 .

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 558304445 + ... + 558340544.

Almost surely, 2^{20155442051450} is an apocalyptic number.

20155442051450 is a deficient number, since it is larger than the sum of its proper divisors (19410639879220).

20155442051450 is a wasteful number, since it uses less digits than its factorization.

20155442051450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116645039 (or 1116645015 counting only the distinct ones).

The product of its (nonzero) digits is 160000, while the sum is 38.

The spelling of 20155442051450 in words is "twenty trillion, one hundred fifty-five billion, four hundred forty-two million, fifty-one thousand, four hundred fifty".