19650490 has 16 divisors (see below), whose sum is σ = 35529480. Its totient is φ = 7824960.

The previous prime is 19650473. The next prime is 19650509. The reversal of 19650490 is 9405691.

It can be written as a sum of positive squares in 4 ways, for example, as 13593969 + 6056521 = 3687^2 + 2461^2 .

It is a super-2 number, since 2×19650490² = 772283514480200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2001 + ... + 6580.

Almost surely, 2^19650490 is an apocalyptic number.

19650490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19650490 is a deficient number, since it is larger than the sum of its proper divisors (15878990).

19650490 is a wasteful number, since it uses less digits than its factorization.

19650490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8817.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 19650490 is about 4432.8873209230. The cubic root of 19650490 is about 269.8512669632.

The spelling of 19650490 in words is "nineteen million, six hundred fifty thousand, four hundred ninety".