20535215001 has 32 divisors (see below), whose sum is σ = 31481776128. Its totient is φ = 11663343360.

The previous prime is 20535214967. The next prime is 20535215003. The reversal of 20535215001 is 10051253502.

It is a happy number.

It is not a de Polignac number, because 20535215001 - 2⁷ = 20535214873 is a prime.

It is a super-5 number, since 5×20535215001⁵ (a number of 53 digits) contains 55555 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20535215003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2845740 + ... + 2852946.

It is an arithmetic number, because the mean of its divisors is an integer number (983805504).

Almost surely, 2^20535215001 is an apocalyptic number.

20535215001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20535215001 is a deficient number, since it is larger than the sum of its proper divisors (10946561127).

20535215001 is a wasteful number, since it uses less digits than its factorization.

20535215001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8021.

The product of its (nonzero) digits is 1500, while the sum is 24.

Adding to 20535215001 its reverse (10051253502), we get a palindrome (30586468503).

The spelling of 20535215001 in words is "twenty billion, five hundred thirty-five million, two hundred fifteen thousand, one".