19461515450 has 48 divisors (see below), whose sum is σ = 39200928480. Its totient is φ = 7145603520.

The previous prime is 19461515443. The next prime is 19461515471. The reversal of 19461515450 is 5451516491.

It is a super-2 number, since 2×19461515450² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19461515398 and 19461515407.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32717 + ... + 199983.

It is an arithmetic number, because the mean of its divisors is an integer number (816686010).

Almost surely, 2^19461515450 is an apocalyptic number.

19461515450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19461515450 is an abundant number, since it is smaller than the sum of its proper divisors (19739413030).

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

19461515450 is a wasteful number, since it uses less digits than its factorization.

19461515450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167471 (or 167466 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 41.

The spelling of 19461515450 in words is "nineteen billion, four hundred sixty-one million, five hundred fifteen thousand, four hundred fifty".