20021154005 has 8 divisors (see below), whose sum is σ = 24077959512. Its totient is φ = 15981873408.

The previous prime is 20021153923. The next prime is 20021154017. The reversal of 20021154005 is 50045112002.

It can be written as a sum of positive squares in 4 ways, for example, as 10874526961 + 9146627044 = 104281^2 + 95638^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 20021154005 - 2⁸ = 20021153749 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 4378712 + ... + 4383281.

It is an arithmetic number, because the mean of its divisors is an integer number (3009744939).

Almost surely, 2^20021154005 is an apocalyptic number.

It is an amenable number.

20021154005 is a deficient number, since it is larger than the sum of its proper divisors (4056805507).

20021154005 is an equidigital number, since it uses as much as digits as its factorization.

20021154005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8762455.

The product of its (nonzero) digits is 400, while the sum is 20.

Adding to 20021154005 its reverse (50045112002), we get a palindrome (70066266007).

The spelling of 20021154005 in words is "twenty billion, twenty-one million, one hundred fifty-four thousand, five".