1012020023 has 4 divisors (see below), whose sum is σ = 1156594320. Its totient is φ = 867445728.

The previous prime is 1012020019. The next prime is 1012020029. The reversal of 1012020023 is 3200202101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1012020023 - 2² = 1012020019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1012019986 and 1012020013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012020029) 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, 72287138 + ... + 72287151.

It is an arithmetic number, because the mean of its divisors is an integer number (289148580).

Almost surely, 2^1012020023 is an apocalyptic number.

1012020023 is a deficient number, since it is larger than the sum of its proper divisors (144574297).

1012020023 is an equidigital number, since it uses as much as digits as its factorization.

1012020023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144574296.

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

The square root of 1012020023 is about 31812.2621484232. The cubic root of 1012020023 is about 1003.9907272441.

Adding to 1012020023 its reverse (3200202101), we get a palindrome (4212222124).

The spelling of 1012020023 in words is "one billion, twelve million, twenty thousand, twenty-three".