1948140621 has 24 divisors (see below), whose sum is σ = 3247830144. Its totient is φ = 1102197600.

The previous prime is 1948140617. The next prime is 1948140631. The reversal of 1948140621 is 1260418491.

1948140621 is a `hidden beast` number, since 19 + 4 + 8 + 14 + 0 + 621 = 666.

It is not a de Polignac number, because 1948140621 - 2² = 1948140617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1948140631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 146721 + ... + 159446.

It is an arithmetic number, because the mean of its divisors is an integer number (135326256).

Almost surely, 2^1948140621 is an apocalyptic number.

It is an amenable number.

1948140621 is a deficient number, since it is larger than the sum of its proper divisors (1299689523).

1948140621 is a wasteful number, since it uses less digits than its factorization.

1948140621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306281 (or 306278 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 1948140621 is about 44137.7459891191. The cubic root of 1948140621 is about 1248.9357599850.

The spelling of 1948140621 in words is "one billion, nine hundred forty-eight million, one hundred forty thousand, six hundred twenty-one".