20612151505 has 32 divisors (see below), whose sum is σ = 28507645440. Its totient is φ = 14165733120.

The previous prime is 20612151487. The next prime is 20612151529. The reversal of 20612151505 is 50515121602.

It is not a de Polignac number, because 20612151505 - 2¹⁷ = 20612020433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62514 + ... + 212443.

It is an arithmetic number, because the mean of its divisors is an integer number (890863920).

Almost surely, 2^20612151505 is an apocalyptic number.

It is an amenable number.

20612151505 is a deficient number, since it is larger than the sum of its proper divisors (7895493935).

20612151505 is a wasteful number, since it uses less digits than its factorization.

20612151505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275049.

The product of its (nonzero) digits is 3000, while the sum is 28.

The spelling of 20612151505 in words is "twenty billion, six hundred twelve million, one hundred fifty-one thousand, five hundred five".