20541931390 has 32 divisors (see below), whose sum is σ = 37895869440. Its totient is φ = 8013478944.

The previous prime is 20541931387. The next prime is 20541931409. The reversal of 20541931390 is 9313914502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55791 + ... + 210229.

It is an arithmetic number, because the mean of its divisors is an integer number (1184245920).

Almost surely, 2^20541931390 is an apocalyptic number.

20541931390 is a deficient number, since it is larger than the sum of its proper divisors (17353938050).

20541931390 is a wasteful number, since it uses less digits than its factorization.

20541931390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154776.

The product of its (nonzero) digits is 29160, while the sum is 37.

The spelling of 20541931390 in words is "twenty billion, five hundred forty-one million, nine hundred thirty-one thousand, three hundred ninety".