20010020123 has 8 divisors (see below), whose sum is σ = 20497520640. Its totient is φ = 19525092840.

The previous prime is 20010020101. The next prime is 20010020131. The reversal of 20010020123 is 32102001002.

It is a happy number.

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 20010020123 - 2¹² = 20010016027 is a prime.

It is a super-3 number, since 3×20010020123³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20010020423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 627563 + ... + 658676.

It is an arithmetic number, because the mean of its divisors is an integer number (2562190080).

Almost surely, 2^20010020123 is an apocalyptic number.

20010020123 is a deficient number, since it is larger than the sum of its proper divisors (487500517).

20010020123 is a wasteful number, since it uses less digits than its factorization.

20010020123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286617.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 20010020123 its reverse (32102001002), we get a palindrome (52112021125).

The spelling of 20010020123 in words is "twenty billion, ten million, twenty thousand, one hundred twenty-three".