1901963668 has 36 divisors (see below), whose sum is σ = 3680593056. Its totient is φ = 859315600.

The previous prime is 1901963653. The next prime is 1901963683. The reversal of 1901963668 is 8663691091.

It is an interprime number because it is at equal distance from previous prime (1901963653) and next prime (1901963683).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 69063 + ... + 92593.

It is an arithmetic number, because the mean of its divisors is an integer number (102238696).

Almost surely, 2^1901963668 is an apocalyptic number.

It is an amenable number.

1901963668 is a deficient number, since it is larger than the sum of its proper divisors (1778629388).

1901963668 is a wasteful number, since it uses less digits than its factorization.

1901963668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23724 (or 23711 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 1901963668 is about 43611.5084352743. The cubic root of 1901963668 is about 1238.9888713527.

It can be divided in two parts, 1901 and 963668, that added together give a palindrome (965569).

The spelling of 1901963668 in words is "one billion, nine hundred one million, nine hundred sixty-three thousand, six hundred sixty-eight".