20015038549490 has 16 divisors (see below), whose sum is σ = 36040527438552. Its totient is φ = 8003024742144.

The previous prime is 20015038549439. The next prime is 20015038549501. The reversal of 20015038549490 is 9494583051002.

It is a Cunningham number, because it is equal to 4473817²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 7205418172681 + 12809620376809 = 2684291^2 + 3579053^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 373806599 + ... + 373860138.

Almost surely, 2^{20015038549490} is an apocalyptic number.

20015038549490 is a deficient number, since it is larger than the sum of its proper divisors (16025488889062).

20015038549490 is a wasteful number, since it uses less digits than its factorization.

20015038549490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747669421.

The product of its (nonzero) digits is 1555200, while the sum is 50.

The spelling of 20015038549490 in words is "twenty trillion, fifteen billion, thirty-eight million, five hundred forty-nine thousand, four hundred ninety".