20615213015454 has 32 divisors (see below), whose sum is σ = 42652484536320. Its totient is φ = 6634731472992.

The previous prime is 20615213015429. The next prime is 20615213015503. The reversal of 20615213015454 is 45451031251602.

It is a super-2 number, since 2×20615213015454² (a number of 27 digits) contains 22 as substring.

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, 28094259 + ... + 28818705.

It is an arithmetic number, because the mean of its divisors is an integer number (1332890141760).

Almost surely, 2^{20615213015454} is an apocalyptic number.

20615213015454 is an abundant number, since it is smaller than the sum of its proper divisors (22037271520866).

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

20615213015454 is a wasteful number, since it uses less digits than its factorization.

20615213015454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888024.

The product of its (nonzero) digits is 144000, while the sum is 39.

The spelling of 20615213015454 in words is "twenty trillion, six hundred fifteen billion, two hundred thirteen million, fifteen thousand, four hundred fifty-four".