1919966142 has 16 divisors (see below), whose sum is σ = 3841151760. Its totient is φ = 639785472.

The previous prime is 1919966119. The next prime is 1919966143. The reversal of 1919966142 is 2416699191.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1919966091 and 1919966100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1919966143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29667 + ... + 68702.

It is an arithmetic number, because the mean of its divisors is an integer number (240071985).

Almost surely, 2^1919966142 is an apocalyptic number.

1919966142 is an abundant number, since it is smaller than the sum of its proper divisors (1921185618).

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

1919966142 is a wasteful number, since it uses less digits than its factorization.

1919966142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101627.

The product of its digits is 209952, while the sum is 48.

The square root of 1919966142 is about 43817.4182489110. The cubic root of 1919966142 is about 1242.8856964582.

The spelling of 1919966142 in words is "one billion, nine hundred nineteen million, nine hundred sixty-six thousand, one hundred forty-two".