1921936031954 has 8 divisors (see below), whose sum is σ = 2889592921728. Its totient is φ = 958738391380.

The previous prime is 1921936031941. The next prime is 1921936031957. The reversal of 1921936031954 is 4591306391291.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1921936031954² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1921936031896 and 1921936031905.

It is not an unprimeable number, because it can be changed into a prime (1921936031957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1114811222 + ... + 1114812945.

It is an arithmetic number, because the mean of its divisors is an integer number (361199115216).

Almost surely, 2^{1921936031954} is an apocalyptic number.

1921936031954 is a deficient number, since it is larger than the sum of its proper divisors (967656889774).

1921936031954 is a wasteful number, since it uses less digits than its factorization.

1921936031954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2229624600.

The product of its (nonzero) digits is 1574640, while the sum is 53.

The spelling of 1921936031954 in words is "one trillion, nine hundred twenty-one billion, nine hundred thirty-six million, thirty-one thousand, nine hundred fifty-four".