20215006001 has 6 divisors (see below), whose sum is σ = 20551836006. Its totient is φ = 19883608800.

The previous prime is 20215005961. The next prime is 20215006003. The reversal of 20215006001 is 10060051202.

It can be written as a sum of positive squares in 3 ways, for example, as 524181025 + 19690824976 = 22895^2 + 140324^2 .

It is not a de Polignac number, because 20215006001 - 2¹⁴ = 20214989617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20215006003) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2712620 + ... + 2720061.

It is an arithmetic number, because the mean of its divisors is an integer number (3425306001).

Almost surely, 2^20215006001 is an apocalyptic number.

It is an amenable number.

20215006001 is a deficient number, since it is larger than the sum of its proper divisors (336830005).

20215006001 is an frugal number, since it uses more digits than its factorization.

20215006001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5432803 (or 5432742 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

Adding to 20215006001 its reverse (10060051202), we get a palindrome (30275057203).

The spelling of 20215006001 in words is "twenty billion, two hundred fifteen million, six thousand, one".