20155044434 has 16 divisors (see below), whose sum is σ = 34703719488. Its totient is φ = 8599822512.

The previous prime is 20155044391. The next prime is 20155044449. The reversal of 20155044434 is 43444055102.

It is a super-2 number, since 2×20155044434² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20155044434.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3167849 + ... + 3174204.

It is an arithmetic number, because the mean of its divisors is an integer number (2168982468).

Almost surely, 2^20155044434 is an apocalyptic number.

20155044434 is a deficient number, since it is larger than the sum of its proper divisors (14548675054).

20155044434 is a wasteful number, since it uses less digits than its factorization.

20155044434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6342289.

The product of its (nonzero) digits is 38400, while the sum is 32.

Adding to 20155044434 its reverse (43444055102), we get a palindrome (63599099536).

The spelling of 20155044434 in words is "twenty billion, one hundred fifty-five million, forty-four thousand, four hundred thirty-four".