19770120 has 48 divisors (see below), whose sum is σ = 64254060. Its totient is φ = 5271936.

The previous prime is 19770103. The next prime is 19770137. The reversal of 19770120 is 2107791.

It is an interprime number because it is at equal distance from previous prime (19770103) and next prime (19770137).

It can be written as a sum of positive squares in 2 ways, for example, as 19342404 + 427716 = 4398^2 + 654^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27099 + ... + 27818.

Almost surely, 2^19770120 is an apocalyptic number.

19770120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19770120 is an abundant number, since it is smaller than the sum of its proper divisors (44483940).

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

19770120 is a wasteful number, since it uses less digits than its factorization.

19770120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54934 (or 54927 counting only the distinct ones).

The product of its (nonzero) digits is 882, while the sum is 27.

The square root of 19770120 is about 4446.3603092867. The cubic root of 19770120 is about 270.3977676251.

The spelling of 19770120 in words is "nineteen million, seven hundred seventy thousand, one hundred twenty".