20203123020 has 48 divisors (see below), whose sum is σ = 56915819520. Its totient is φ = 5354444736.

The previous prime is 20203122991. The next prime is 20203123027. The reversal of 20203123020 is 2032130202.

It is a super-2 number, since 2×20203123020² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (20203123027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1023100 + ... + 1042659.

It is an arithmetic number, because the mean of its divisors is an integer number (1185746240).

Almost surely, 2^20203123020 is an apocalyptic number.

20203123020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20203123020 is an abundant number, since it is smaller than the sum of its proper divisors (36712696500).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20203123020 is a wasteful number, since it uses less digits than its factorization.

20203123020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065934 (or 2065932 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 20203123020 its reverse (2032130202), we get a palindrome (22235253222).

The spelling of 20203123020 in words is "twenty billion, two hundred three million, one hundred twenty-three thousand, twenty".