1540512020 has 48 divisors (see below), whose sum is σ = 3497410560. Its totient is φ = 567990144.

The previous prime is 1540512019. The next prime is 1540512049. The reversal of 1540512020 is 202150451.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1540511983 and 1540512001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40724 + ... + 68843.

It is an arithmetic number, because the mean of its divisors is an integer number (72862720).

Almost surely, 2^1540512020 is an apocalyptic number.

1540512020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1540512020 is an abundant number, since it is smaller than the sum of its proper divisors (1956898540).

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

1540512020 is a wasteful number, since it uses less digits than its factorization.

1540512020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109632 (or 109630 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 1540512020 is about 39249.3569374073. The cubic root of 1540512020 is about 1154.9283189837.

Adding to 1540512020 its reverse (202150451), we get a palindrome (1742662471).

The spelling of 1540512020 in words is "one billion, five hundred forty million, five hundred twelve thousand, twenty".