1918650972 has 48 divisors (see below), whose sum is σ = 5203134720. Its totient is φ = 538893312.

The previous prime is 1918650953. The next prime is 1918650973. The reversal of 1918650972 is 2790568191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1918650973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188613 + ... + 198524.

It is an arithmetic number, because the mean of its divisors is an integer number (108398640).

Almost surely, 2^1918650972 is an apocalyptic number.

1918650972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1918650972 is an abundant number, since it is smaller than the sum of its proper divisors (3284483748).

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

1918650972 is a wasteful number, since it uses less digits than its factorization.

1918650972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387210 (or 387208 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 48.

The square root of 1918650972 is about 43802.4082899559. The cubic root of 1918650972 is about 1242.6018408698.

The spelling of 1918650972 in words is "one billion, nine hundred eighteen million, six hundred fifty thousand, nine hundred seventy-two".