20155464506 has 8 divisors (see below), whose sum is σ = 30296315520. Its totient is φ = 10056692668.

The previous prime is 20155464487. The next prime is 20155464509. The reversal of 20155464506 is 60546455102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20155464506.

It is not an unprimeable number, because it can be changed into a prime (20155464509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10518596 + ... + 10520511.

It is an arithmetic number, because the mean of its divisors is an integer number (3787039440).

Almost surely, 2^20155464506 is an apocalyptic number.

20155464506 is a deficient number, since it is larger than the sum of its proper divisors (10140851014).

20155464506 is a wasteful number, since it uses less digits than its factorization.

20155464506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21039588.

The product of its (nonzero) digits is 144000, while the sum is 38.

The spelling of 20155464506 in words is "twenty billion, one hundred fifty-five million, four hundred sixty-four thousand, five hundred six".