1911961842 has 32 divisors (see below), whose sum is σ = 4371840000. Its totient is φ = 546069648.

The previous prime is 1911961823. The next prime is 1911961861. The reversal of 1911961842 is 2481691191.

It is an interprime number because it is at equal distance from previous prime (1911961823) and next prime (1911961861).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1911961794 and 1911961803.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131659 + ... + 145457.

It is an arithmetic number, because the mean of its divisors is an integer number (136620000).

Almost surely, 2^1911961842 is an apocalyptic number.

1911961842 is an abundant number, since it is smaller than the sum of its proper divisors (2459878158).

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

1911961842 is a wasteful number, since it uses less digits than its factorization.

1911961842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17110.

The product of its digits is 31104, while the sum is 42.

The square root of 1911961842 is about 43725.9858893999. The cubic root of 1911961842 is about 1241.1561022384.

The spelling of 1911961842 in words is "one billion, nine hundred eleven million, nine hundred sixty-one thousand, eight hundred forty-two".