1020520469450 has 24 divisors (see below), whose sum is σ = 2009825020332. Its totient is φ = 384195941120.

The previous prime is 1020520469447. The next prime is 1020520469453. The reversal of 1020520469450 is 549640250201.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1020520469447) and next prime (1020520469453).

It can be written as a sum of positive squares in 6 ways, for example, as 358359074161 + 662161395289 = 598631^2 + 813733^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1020520469453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 600305309 + ... + 600307008.

Almost surely, 2^{1020520469450} is an apocalyptic number.

1020520469450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1020520469450 is a deficient number, since it is larger than the sum of its proper divisors (989304550882).

1020520469450 is a wasteful number, since it uses less digits than its factorization.

1020520469450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200612346 (or 1200612341 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 1020520469450 in words is "one trillion, twenty billion, five hundred twenty million, four hundred sixty-nine thousand, four hundred fifty".