19770190 has 24 divisors (see below), whose sum is σ = 39117960. Its totient is φ = 7188720.

The previous prime is 19770187. The next prime is 19770197. The reversal of 19770190 is 9107791.

It is a happy number.

It is a super-2 number, since 2×19770190² = 781720825272200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19770197) 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, 6960 + ... + 9379.

It is an arithmetic number, because the mean of its divisors is an integer number (1629915).

Almost surely, 2^19770190 is an apocalyptic number.

19770190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19770190 is a deficient number, since it is larger than the sum of its proper divisors (19347770).

19770190 is a wasteful number, since it uses less digits than its factorization.

19770190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16368 (or 16357 counting only the distinct ones).

The product of its (nonzero) digits is 3969, while the sum is 34.

The square root of 19770190 is about 4446.3681808865. The cubic root of 19770190 is about 270.3980867569.

It can be divided in two parts, 197701 and 90, that added together give a palindrome (197791).

The spelling of 19770190 in words is "nineteen million, seven hundred seventy thousand, one hundred ninety".