1699900020 has 360 divisors, whose sum is σ = 6606762624. Its totient is φ = 358255872.

The previous prime is 1699900003. The next prime is 1699900021. The reversal of 1699900020 is 200099961.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1699900021) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 1916017 + ... + 1916903.

Almost surely, 2^1699900020 is an apocalyptic number.

1699900020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1699900020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3303381312).

1699900020 is an abundant number, since it is smaller than the sum of its proper divisors (4906862604).

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

1699900020 is a wasteful number, since it uses less digits than its factorization.

1699900020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941 (or 917 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 1699900020 is about 41229.8438027602. The cubic root of 1699900020 is about 1193.4597945178.

Adding to 1699900020 its reverse (200099961), we get a palindrome (1899999981).

The spelling of 1699900020 in words is "one billion, six hundred ninety-nine million, nine hundred thousand, twenty".